When Abdullah bin Umar (may Allah be pleased with them both) was asked about the prayer of fear (Salat al-Khawf), he would say: A group of people should advance with the Imam and the Imam should lead them in one rak’ah of prayer, while the other group does not pray but stands between them and the enemy. When those who were with the Imam have completed one rak’ah, they should go to the place of those who have not prayed, without saying salam, and those who have not prayed should come forward and perform one rak’ah with the Imam. Then, when the Imam has completed two rak’ahs, he should say salam. Both groups should then stand and each complete one rak’ah on their own, so that both groups will have performed two rak’ahs each. If the fear becomes very intense, then they should pray standing or riding, whether facing the qiblah or any other direction. Nafi’ (may Allah have mercy on him) says: Abdullah bin Umar (may Allah be pleased with them both) narrated this method from the Messenger of Allah (peace and blessings be upon him).

Salih bin Khawwat (may Allah have mercy on him) narrates from the man who offered the prayer of fear with the Messenger of Allah (peace be upon him) on the day of the battle of Dhat al-Riqa’ that one group joined the row with the Prophet (peace be upon him) and another group stood facing the enemy. The Prophet (peace be upon him) led his companions in one rak’ah and then stood straight, so they completed the second rak’ah separately. They then stood in the row facing the enemy, and the other group came. The Prophet (peace be upon him) led them in the remaining rak’ah and then sat straight until they completed the second rak’ah themselves, then the Prophet (peace be upon him) said the salam.

Sayyiduna Sahl bin Huthmah (may Allah be pleased with him) narrates regarding the prayer of fear (Salat al-Khawf) that one group will stand in front of the Imam and one group will stand behind the Imam. Then the Imam will lead those behind him in one bowing (ruku) and two prostrations (sujood) (i.e., one rak’ah), and he will remain seated in his place until they complete another bowing and two prostrations (i.e., perform the second rak’ah). Then these will go to the place of their companions and those will come to their place. The Imam will lead them in one bowing and two prostrations, and he will remain seated in his place until they complete another bowing and two prostrations. Then he will say the salam (to end the prayer).

This narration is also reported through this chain.

Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said regarding this noble verse: If you face hardship due to rain or you are ill (then combine the prayers). At that time, Sayyiduna Abdur Rahman bin Awf (may Allah be pleased with him) was injured.

Sayyiduna Anas bin Malik (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings of Allah be upon him) said: Whoever forgets to pray a prayer or sleeps through it, its expiation is only that he should pray it when he remembers it.

Abu Huraira (may Allah be pleased with him) narrates that we camped with the Messenger of Allah (peace and blessings be upon him) in the last part of the night, and it was the heat of the sun that woke us up. The Prophet (peace and blessings be upon him) said: "Let every person take hold of his camel's rein and move from this place." Then he asked for water, performed ablution, and offered two units of prayer (Sunnah). Then the Iqamah was pronounced and the obligatory prayer was performed.

Sayyiduna Abu Sa'id Khudri (may Allah be pleased with him) narrates that the Noble Prophet (peace and blessings be upon him) said: If anyone is uncertain in prayer whether he has prayed three (rak‘ahs) or four, he should stand up and pray one more rak‘ah, so that the doubtful rak‘ah becomes an extra one. Then, before the salam, he should perform two prostrations of forgetfulness (sujud al-sahw). If he has prayed five rak‘ahs, these prostrations will make them even, and if he has prayed only four, they will humiliate Satan.

Sayyiduna Abdullah bin Buhaina (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) led them in prayer, and after two rak‘ahs he stood up (without sitting for tashahhud). We said «سبحان الله» , but he continued the prayer, then performed two (sujood as-sahw) prostrations and ended the prayer with salam. These are the words of Ahmad bin Sa‘eed al-Darimi.

Sayyiduna Abu Hurairah (may Allah be pleased with him) narrates that the Messenger of Allah (peace and blessings be upon him) led us in one of the prayers after the sun had declined, either Zuhr or Asr—I think it was Asr. After leading two rak‘ahs, he said salam and ended the prayer. Then, angrily, he moved forward and sat by a date-palm trunk. Those who were quick to leave began saying,“The prayer has been shortened, the prayer has been shortened.”Dhu’l-Yadayn (may Allah be pleased with him) came forward and asked,“O Messenger of Allah! Has the prayer been shortened, or did you forget?”He said,“Is Dhu’l-Yadayn speaking the truth?”The people replied,“Yes!”The narrator says: He (the Prophet) then performed two more rak‘ahs and said salam, then said takbir and prostrated, then said takbir and raised his head, then said takbir and prostrated, then said takbir and raised his head.