It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that Sayyiduna Umar Farooq (may Allah be pleased with him) expelled the Jews and Christians from the land of Hijaz, and when the Noble Prophet (peace and blessings be upon him) conquered Khaybar, he intended at that very time to expel the Jews from there, because the land belongs to Allah, His Messenger, and the Muslims. However, the Jews requested the Noble Prophet (peace and blessings be upon him) to let them stay there, promising that they would work hard and suffice the Muslims, and would give them half of the fruits. The Noble Prophet (peace and blessings be upon him) said: "We will let you stay here as long as we wish" (i.e., it will be subject to our discretion). Thus, those people continued to live there until Sayyiduna Umar (may Allah be pleased with him) expelled them towards Tayma and Ariha.

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) said: "When any one of you comes for Jumu'ah, he should come after performing ghusl (ritual bath)."

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that he heard the Noble Prophet (peace and blessings be upon him) saying while on the pulpit: When any person comes for Jumu'ah, he should come after performing ghusl (ritual bath).

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) said: "No person should make another get up from his place and then sit there himself." I asked the narrator whether this prohibition is meant specifically for the day of Jumu'ah (Friday)? He replied: "It includes both Jumu'ah and other than Jumu'ah."

Narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that he said: Whoever prays at night should make the last prayer the Witr, because the Noble Prophet (peace and blessings of Allah be upon him) commanded this. When the dawn breaks, the time for the night prayer and Witr ends, because the Noble Prophet (peace and blessings of Allah be upon him) said: "Perform Witr before the dawn breaks."

Sayyiduna Ibn Umar (may Allah be pleased with them both) narrates that whoever prays at night should make the last prayer Witr, because the Noble Prophet (peace and blessings be upon him) commanded this.

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that when the Noble Prophet (peace and blessings be upon him) would mount his ride, he would say "Allahu Akbar" three times, then recite this supplication: "Glory be to Him Who has subjected this (ride) to us, and we could not have subdued it (by ourselves), and surely to our Lord we are returning." Then he would supplicate: "O Allah, I ask You for goodness, piety, and deeds that please You in this journey of mine. O Allah, make this journey easy for us and fold up the distances of the land for us. O Allah, You are my companion in the journey and the successor over my family. O Allah, accompany us in the journey and be the guardian of our family in our absence." And when he would return home, he would recite this supplication: "We return, repenting, if Allah wills, worshipping our Lord and praising Him."

Nafi’ (may Allah have mercy on him) says that Sayyiduna Ibn Umar (may Allah be pleased with them both) combined two prayers only once. The situation was that he received news of the illness of Safiyyah bint Abi Ubayd. He set out after the Asr prayer, left his belongings there, and increased his pace. During the journey, the time for Maghrib prayer arrived. One of his companions drew his attention and said that the time for prayer had come, but he did not reply to him. Another said it, but he did not reply to him either. Even when a third person said it, he did not reply. When it was said a fourth time, he said:“I saw the Noble Prophet (peace and blessings be upon him) that if he was in a hurry while traveling, he would delay this prayer and combine two prayers together.”

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "The sale of fruits in exchange for dates and the sale of dates in exchange for fruits is not valid until they have ripened well."

It is narrated from Sayyiduna Ibn Umar (may Allah be pleased with them both) that the Noble Prophet (peace and blessings be upon him) led the Salat al-Khawf (prayer of fear) in such a way that he made one group stand behind him and had them perform one bowing (ruku) and two prostrations (sajdah), while the other group stood facing the enemy. Then the group that had prayed one rak’ah with the Noble Prophet (peace and blessings be upon him) left, and the other group came. The Noble Prophet (peace and blessings be upon him) had them also perform one bowing and two prostrations, and then the Noble Prophet (peace and blessings be upon him) said the salam (ended the prayer). After that, every person from both groups stood up and completed one rak’ah with two prostrations by themselves.