It is narrated from Sayyiduna Ibn Abbas (may Allah be pleased with them both) that the Prophet (peace and blessings be upon him) said on the day of Badr: "This is Jibril (peace be upon him), holding the reins of a horse with him, upon which is the equipment of war."
Hadith Referenceالمعجم الكبير للطبراني / باب العين / 11902