Musnad Ahmad 32:1638

'Affan narrated to us, Hammam narrated to us, Qatadah narrated to us, from Anas: "That the Messenger of Allah (ﷺ) forbade continuous fasting (al-wisal)." He said: So it was said, "Indeed, you practice continuous fasting." He said: "I am not like you; I spend the night while my Lord feeds me and gives me to drink."