Ibn ‘Umar reported God’s Messenger as saying, “Prayer during the night should consist of pairs of rak'as, but if one of you fears the morning is near he should pray one rak'a which will make his prayer an odd number for him.”
Salim b. Abul Ja'd told of a man of Khuza'a saying, “I wish I had prayed and been at rest.” When the people seemed to disapprove of his saying that, he replied that he had heard God’s Messenger say, “Declare that the time for prayer has come, Bilal, and give us rest by it.”*
* This probably means that prayer brings peace of mind.
I was told that God’s Messenger had said, “Prayer engaged in by a man while sitting counts as half the prayer,” so I went to him and I found him praying while sitting, and I put my hand on his head. He said, “What is the matter with you, ‘Abdallah b. ‘Amr? ’’ I replied, “I have been told, Messenger of God, that you said that prayer engaged in by a man while sitting counts as half the prayer, yet you yourself are praying while sitting.” He said, “Yes, but I am not like one of you.”