Musnad Abu Ya'la al-Mawsili 137:2

Abu Bakr ibn Abi Shaybah narrated to us, Ibn Idris narrated to us, from Malik ibn Mighwal, from al-Zubayr ibn Adi, from Anas, who said: "There is no day except that the one after it is worse than it. We heard that from your Prophet, may Allah bless him and grant him peace."