Musnad Abu Ya'la al-Mawsili 107:24

Zuhayr narrated to us, Yazid bin Harun narrated to us, Aban bin Yazid informed us, from Qatadah, from Nu'aym bin Hammar, from Uqbah bin Amir, who said: The Messenger of Allah (ﷺ) said: "O son of Adam, are you unable to pray four rak'ahs at the beginning of the day, so that I may suffice you for the end of your day?"