Musnad Abu Ya'la al-Mawsili 3:227

Suwayd narrated to us, Salih ibn Musa narrated to us, from Abdullah ibn al-Hasan, from his mother Fatimah bint al-Husayn, from her father, from Ali, that the Messenger of Allah (may Allah bless him and grant him peace) said: "All favors are oppressive or unjust."