Musnad Abu Ya'la al-Mawsili 160:223

Ishaq ibn Abi Isra'il narrated to us, Waki' narrated to us, he said: Ibrahim ibn al-Fadl al-Makhzumi narrated to me, from Sa'id al-Maqburi, from Abu Hurayrah, he said: The Messenger of Allah (may Allah bless him and grant him peace) said: "Ward off the prescribed punishments (hudud) as much as you are able."