Musnad Ahmad 30:2655

Waki’ narrated to us, he said: Hammad ibn Salamah narrated to us, from Muhammad ibn Ziyad, from Abu Hurairah, he said: The Messenger of Allah, peace and blessings of Allah be upon him, said: "Our Lord, Mighty and Majestic is He, marvels at a people who are led to Paradise in chains."