Imam Ibn Sirin (may Allah have mercy on him) says that I asked Hazrat Anas (may Allah be pleased with him) whether Hazrat Umar (may Allah be pleased with him) used to recite Qunoot Nazilah. He replied that a person better than Hazrat Umar (may Allah be pleased with him), that is, the Prophet (peace and blessings be upon him), also used to recite Qunoot Nazilah after bowing (ruku).