Musnad Ahmad 27:1366

'Affan narrated to us, Wuhayb narrated to us, Musa ibn 'Uqbah narrated to us, Salim narrated to me, from 'Abdullah, that the Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever drags his garment out of pride, Allah will not look at him on the Day of Resurrection." Abu Bakr said: "O Messenger of Allah, one side of my lower garment slips down, unless I am diligent about it." He said: "You are not among those who do it out of pride."