Ubaydullah bin Abi Rafi' (may Allah have mercy on him), naming those who were present with Sayyiduna Ali (may Allah be pleased with him), said: al-Harith bin al-Nu'man, who was a veteran of Badr, was also among them.
Hadith Referenceالمعجم الكبير للطبراني / باب الحاء / 3381