Khalad bin Khalad Ansari narrates: We performed prayer one day behind Umar bin Abdul Aziz, then we went to the service of Sayyiduna Anas bin Malik (may Allah be pleased with him), and we found him standing and performing prayer. When he completed the prayer, we asked: O Abu Hamzah! Which prayer did you just perform? He replied: Asr prayer. We said: We have just come after performing the Zuhr prayer which we offered behind Umar bin Abdul Aziz. So Sayyiduna Anas (may Allah be pleased with him) informed us: I saw the Prophet Muhammad (peace and blessings be upon him) performing this prayer in this (time) manner; I will never abandon it.