Muhammad bin Abi Umairah (may Allah be pleased with him), who was a companion of the Messenger of Allah (peace and blessings be upon him), narrated that he said: If a servant were to remain prostrating in obedience to Allah from the day of his birth until he grows old and dies, he would still consider it insignificant on the Day of Resurrection, and he would wish that he could be sent back to the world so that he could increase his reward and recompense. Both narrations have been transmitted by Imam Ahmad. Its chain is authentic, narrated by Ahmad.