It is narrated from Hazrat Ibn Abbas (may Allah be pleased with them both) with reference to Ubayy bin Ka'b (may Allah be pleased with him) that when the Holy Prophet (peace and blessings be upon him) would supplicate for someone, he would begin with himself. Thus, one day while mentioning Hazrat Musa (peace be upon him), he said: "May Allah's mercy descend upon us and upon Musa (peace be upon him). If he had been patient, Allah the Exalted would have narrated further details of his story, but he said: 'If I ask you about anything after this, then do not keep me with you; you have received an excuse from me.'"