Musnad Ahmad 457:24

'Abd al-Razzaq narrated to us, Sufyan informed us, from al-A'mash, from Abu 'Amr al-Shaybani, from Abu Mas'ud, who said: A man came to the Prophet, may Allah bless him and grant him peace, and said: "I have been rendered unable to continue (ubdi'a bi) — meaning I have been cut off — so provide me with a mount." Then he mentioned the rest of the hadith.