Musnad Ahmad 1153:458

'Abd al-Samad and 'Affan narrated to us, they said: Hammad narrated to us. 'Affan said: He informed us of the meaning, from 'Ali ibn Zayd, from Sa'id, from 'A'ishah, that the Messenger of Allah (peace and blessings of Allah be upon him) was among a group of the Emigrants (Muhajirun) and the Helpers (Ansar). A camel came and prostrated to him. His companions said: "O Messenger of Allah, the beasts and the trees prostrate to you, so we are more deserving to prostrate to you." He said: "Worship your Lord and honor your brother. And if I were to command anyone to prostrate to anyone, I would have commanded the woman to prostrate to her husband. And if he were to command her to move from a yellow mountain to a black mountain, and from a black mountain to a white mountain, it would be incumbent upon her to do it."