Musnad Ahmad 30:2575

'Ammar ibn Muhammad narrated to us, from 'Ata'—meaning Ibn al-Sa'ib—from al-Agharr Abu Muslim, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Allah, the Almighty and Majestic, says: 'Pride is My cloak, and Greatness is My lower garment. Whoever disputes with Me regarding either of them, I will cast him into Hell.'"