Musnad Ahmad 30:2711

Hajjaj and Yazid narrated to us, they said: Ibn Abi Dhi'b informed us, from Sa'id al-Maqburi, from his father, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever does not abandon false speech, acting upon it, and ignorance, then Allah has no need for him to abandon his food and his drink."