Musnad Abu Ya'la al-Mawsili 151:27

Ubayd Allah ibn Umar narrated to us, Yahya ibn Hammad ibn Salamah narrated to us, Asim ibn Bahdalah narrated to us, from Zirr, from Abdullah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "I saw Gabriel at the Lote Tree (Sidrat al-Muntaha), and upon him were six hundred wings, from whose feathers were scattering the variegated colors of pearls and rubies."