Hazrat Nofal bin Masaheq narrated that it was mentioned before Umar bin Abdul Aziz (may Allah have mercy on him) that Salim (may Allah have mercy on him) raises his hands in prayer. So he said, "What do you think, did Salim not learn this from his father? And did his father, Abdullah bin Umar (may Allah be pleased with them both), not learn it from the Messenger of Allah (peace and blessings be upon him)?"