Musnad Abu Ya'la al-Mawsili 3:350

Zuhayr narrated to us, Waki' narrated to us, al-A'mash narrated to us, from Sa'd ibn 'Ubaydah, from Abu 'Abd al-Rahman, from 'Ali, who said: We were with the Prophet (peace and blessings of Allah be upon him), and he said: "There is not one among you except that his seat in Paradise and his seat in the Fire have been written." We said: "O Messenger of Allah, shall we not then rely [upon this]?" He said: "No, act, for everyone is facilitated for what he was created for." Then he recited: "As for him who gives and fears Allah, and believes in the best (reward), We will facilitate for him the path to ease. But as for him who withholds and considers himself self-sufficient, and denies the best (reward), We will facilitate for him the path to hardship."