Sayyiduna Sahl bin Abi Hathmah رضي الله عنه narrates from the Noble Prophet صلى الله عليه وسلم. Bundar says that it is narrated like the hadith of Yahya bin Saeed. And Yahya said to me, "Write on one side of it, I do not remember the hadith well, but it is like the hadith of Yahya bin Saeed." And Abu Musa says that Yahya said to me, "Have you heard from me the hadith of Yahya bin Saeed regarding the prayer of fear?" I said, "Yes." So he said, "Then write it on its side, in the same way."

And to sit and wait for the other group so that they may also complete the second rak‘ah.

Sayyiduna Sahl bin Abi Hathmah (may Allah be pleased with him) describes the method of Salat al-Khawf (the prayer of fear): One group will stand behind the Imam, while the other group will stand behind them (facing the enemy). The Imam will lead the group standing behind him in one bowing (ruku‘) and two prostrations (sujud). Then he will remain seated in his place until they complete the second rak‘ah with its two prostrations. Then they will go to the place of their companions, and those companions will come to their place. The Imam will then lead them in one rak‘ah with two prostrations, and then he will remain seated in his place until they complete the second rak‘ah and two prostrations. Then the Imam will say the salam (to conclude the prayer) with this group.

Sayyiduna Sahl bin Abi Hathmah (may Allah be pleased with him) narrates a similar narration from the Noble Prophet (peace and blessings of Allah be upon him).

The Imam narrates another chain of transmission for the hadith of Sahal.

If the enemy is behind the qiblah and the imam waits standing after finishing the first rak‘ah for the group that made takbir not facing the qiblah, then they pray the rak‘ah which the imam preceded them with, and the first group waits sitting after finishing two rak‘ahs before the salam, so that the second rak‘ah may be completed, in order to unite them all with the salam, and they give salam when their imam gives salam.

Hazrat Urwah bin Zubair (may Allah have mercy on him) narrates from Mardan bin Hakam that he asked Sayyiduna Abu Hurairah (may Allah be pleased with him), "Did you offer the prayer of fear (Salat al-Khawf) with the Noble Prophet (peace and blessings be upon him)?" Sayyiduna Abu Hurairah (may Allah be pleased with him) replied, "Yes." He asked, "When?" He replied, "In the year of the Battle of Najd." The Messenger of Allah (peace and blessings be upon him) stood for the Asr prayer and one group stood with him, while the other group stood facing the enemy, their backs towards the Qiblah. The Messenger of Allah (peace and blessings be upon him) said «‏‏‏‏اللهُ أَكْبَرُ» ‏‏‏‏, so all the people said «‏‏‏‏اللهُ أَكْبَرُ» ‏‏‏‏ and began the prayer, both those who stood with him and those who were facing the enemy. Then the Messenger of Allah (peace and blessings be upon him) prayed one rak'ah and the group with him also performed one rak'ah. Then the Messenger of Allah (peace and blessings be upon him) and his group performed the prostrations, while the other group remained arrayed before the enemy. Then the Messenger of Allah (peace and blessings be upon him) and his close row stood up. So they went to face the enemy. And the group that was arrayed before the enemy came forward, so they performed the bowing (ruku') and (two) prostrations, while during this time the Messenger of Allah (peace and blessings be upon him) remained standing. Then they stood up, so the Messenger of Allah (peace and blessings be upon him) prayed the second rak'ah, so they also performed the bowing and prostrations with him. Then the group that was standing before the enemy came forward, so they (by themselves) performed the second bowing and prostrations, while during this time the Messenger of Allah (peace and blessings be upon him) and his companions (the first group) remained seated. Then the Messenger of Allah (peace and blessings be upon him) said the salam, and the Messenger of Allah (peace and blessings be upon him) and all the people said the salam together. In this way, the Messenger of Allah (peace and blessings be upon him) completed two rak'ahs, and each person from both groups also completed two rak'ahs.

Hazrat Urwah bin Zubair narrates that I heard Sayyiduna Abu Hurairah (may Allah be pleased with him) while Furwan bin Hakam was asking him about the prayer of fear. So Sayyiduna Abu Hurairah (may Allah be pleased with him) said, I was present with the Messenger of Allah (peace and blessings of Allah be upon him) in that battle. He says that the Messenger of Allah (peace and blessings of Allah be upon him) divided the people into two groups, then narrated similar to the aforementioned hadith, and in the second rak'ah he stated that the group which had prayed with the Prophet (peace and blessings of Allah be upon him) took up their weapons, then they walked backwards until they stood near the enemy. And at the end of the hadith, these words were added: the people stood up in such a state that all of them had participated in the prayer with the Messenger of Allah (peace and blessings of Allah be upon him).

And he will wait for the other group so that they may join the Imam after praying one rak'ah, then they will perform the second prostration with him. Then the Imam will stand and wait for them so that they may complete their second prostration, and the Imam will gather both groups for the second rak'ah. In this way, the Imam and the followers will finish the prayer together.

Lady Aisha (may Allah be pleased with her) narrates that the Messenger of Allah (peace and blessings be upon him) led the prayer of fear on the occasion of the Battle of Dhat al-Riqa. The Messenger of Allah (peace and blessings be upon him) divided the people into two groups: one group formed a row behind him and the other group stood in formation facing the enemy. Then the Messenger of Allah (peace and blessings be upon him) said «‏‏‏‏اللهُ أَكْبَرُ» ‏‏‏‏, so the group that formed a row behind him also started the prayer by saying «‏‏‏‏اللهُ أَكْبَرُ» ‏‏‏‏. The Messenger of Allah (peace and blessings be upon him) performed bowing (ruku‘), so they also performed bowing. The Messenger of Allah (peace and blessings be upon him) performed prostration (sujud), so they also performed prostration. Then when the Messenger of Allah (peace and blessings be upon him) raised his blessed head (from prostration), they also raised their heads. Then the Messenger of Allah (peace and blessings be upon him) remained in his place, and they performed the second prostration by themselves. Then they stood up and turned on their heels, walking backwards to stand behind their companions, and the second group came forward. They formed a row behind the Messenger of Allah (peace and blessings be upon him), and they started the prayer by saying the takbir. Then they performed bowing by themselves. Then when the Messenger of Allah (peace and blessings be upon him) performed his second prostration, they also performed (the first) prostration with him. The Messenger of Allah (peace and blessings be upon him) stood up for his (second) rak‘ah, and they performed their second prostration by themselves. Then both groups stood up and formed rows behind the Messenger of Allah (peace and blessings be upon him). The Messenger of Allah (peace and blessings be upon him) performed bowing with them, so they all performed bowing. Then the Messenger of Allah (peace and blessings be upon him) performed prostration, so they also performed prostration. Then when the Messenger of Allah (peace and blessings be upon him) raised his blessed head (from prostration), they also raised their heads. The Messenger of Allah (peace and blessings be upon him) did this very quickly and, as much as possible, tried to make it easy. Then the Messenger of Allah (peace and blessings be upon him) said the salam, so they also said the salam. Then the Messenger of Allah (peace and blessings be upon him) stood up, while all the people had participated in the entire prayer.