It is narrated from al-Zuhri (may Allah have mercy on him) that the Messenger of Allah (peace and blessings be upon him) sent word to Safwan bin Umayyah concerning some weapons which had been mentioned to him as being with him, and asked him for them. Safwan (may Allah be pleased with him) said: Where is the guarantee? Will you take them by force? So the Messenger of Allah (peace and blessings be upon him) said: "If you wish, keep your weapons; and if you lend them to me, I am responsible for them until they are returned." Safwan (may Allah be pleased with him) said: There is no harm in this; I lend them to you. So that day he gave them to him; some people claim it was a hundred coats of armour along with their equipment. Safwan (may Allah be pleased with him) had a great deal of weaponry. The Messenger of Allah (peace and blessings be upon him) said: "Spare us the carrying of them." So Safwan (may Allah be pleased with him) carried them. Then he mentioned the Battle of Hunayn, in which it is (stated) that a man of Quraysh passed by Safwan bin Umayyah (may Allah be pleased with him) and said: Rejoice at the defeat of Muhammad (peace and blessings be upon him) and his companions. Safwan (may Allah be pleased with him) said to him: Do you give me the good news of the victory of the Bedouins? By Allah! A lord from Quraysh is dearer to me than a lord from the Bedouins. Safwan (may Allah be pleased with him) sent his slave and said: Listen, whose battle cry is it? The slave came and said: I heard them saying: "Ya bani Abd al-Rahman, ya bani Abdillah, ya bani Ubaydillah" (O sons of Abd al-Rahman, O sons of Abdullah, O sons of Ubaydullah). Safwan (may Allah be pleased with him) said: Muhammad (peace and blessings be upon him) has prevailed. That was their battle cry in war.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب قسم الصدقات / 13185