Musnad Ahmad Hadith 12980

It is narrated from Anas (may Allah be pleased with him) that once, during the night, Usaid bin Hudair (may Allah be pleased with him) and another companion were sitting with the Prophet (ﷺ) discussing some matter. During this, a large part of the night passed and it was very dark. When they left the Prophet (ﷺ) to go home, one of them had a staff in his hand. The staff of one of the men became illuminated, and they began to walk in its light. When both of them separated to go their own ways, the staff of the other man also became illuminated.