Musnad Ahmad 30:2148

'Affan narrated to us, Hammad ibn Salamah narrated to us, he said: Muhammad ibn Ziyad informed us, he said: I heard Abu Hurairah saying: I heard the Messenger of Allah, peace and blessings of Allah be upon him, saying: "Our Lord, Mighty and Majestic is He, marvels at people who are led to Paradise in chains."