Musnad Ahmad 1105:5

Waki’ narrated to us, Ibn Abi Layla narrated to us, from Muhammad ibn ‘Abd al-Rahman ibn Sa’d ibn Zurarah, from Muhammad ibn Sharhabil, from Qais ibn Sa’d, who said: The Prophet, may Allah bless him and grant him peace, came to us, so we prepared a bath for him, and he bathed. Then we brought him a garment dyed with wars (a yellow plant used for dyeing), and he wrapped himself in it. It is as if I am looking at the trace of the wars on his abdominal folds. Then we brought him a donkey for him to ride, and he said: "The owner of the donkey has more right to the front of his donkey." We said: "O Messenger of Allah, then the donkey is yours."