Musnad Ahmad 26:365

'Affan narrated to us, Hammad ibn Salamah narrated to us, from 'Asim ibn Bahdalah, from Zirr, from Ibn Mas'ud, that he said regarding this verse: {And he certainly saw him in another descent} [An-Najm: 13], the Messenger of Allah (ﷺ) said: "I saw Jibril at Sidrat al-Muntaha, having six hundred wings. There were scattering from his feathers various colors: pearls and rubies."