Abu Marzuq (may Allah have mercy on him), the freed slave of the tribe of Tujib, said: We went out on jihad towards the west with Sayyiduna Ruwayfi' bin Thabit al-Ansari (may Allah be pleased with him). We conquered a town called Jarbah, and he stood among us to deliver a sermon and said: "I will say nothing concerning you except what I heard the Messenger of Allah (peace and blessings be upon him) say concerning us on the day of the Battle of Khaybar. He said: 'Whoever believes in Allah and the Last Day must not ride any animal from the spoils of the Muslims until, having made it emaciated, he returns it to the spoils; nor wear any garment from the spoils of the Muslims until, having worn it out, he returns it to the spoils.'"