Musannaf Ibn Abi Shayba 13:2089

Abu Bakr narrated to us, he said: Waki’ narrated to us, he said: Sufyan narrated to us, from Marzuq al-Taymi, from Ibrahim, he said regarding the pledge in the *‘aynah* (transaction): The Prophet, may Allah bless him and grant him peace, passed away while his armor was pledged.