Sayyidah Aishah Siddiqah (may Allah be pleased with her) narrates that the Prophet (peace and blessings be upon him) said: "O Aishah! If I wished, the mountains would turn to gold and go along with me. An angel came to me whose waist was as large as the Ka'bah. He said: Your Lord sends you salam and says to you: If you wish, become a 'servant' prophet, and if you wish, become a 'king' prophet. The Prophet (peace and blessings be upon him) says: I looked towards Sayyiduna Jibril (peace be upon him), and he signalled to me that I should adopt humility. So I said: A 'servant' prophet (is what I would wish to be)." The narrator says: After that the Prophet (peace and blessings be upon him) never ate while reclining. He used to say: I will eat as a servant eats, and sit as a servant sits.
Imam Abu Ya'la recorded this narration, and its chain is hasan (good).