Sahih Muslim | Book 30 | Hadith Number 5752

Narrated by 'Aisha
'Aisha, the wife of Allah's Apostle (may peace be upon him), said that whenever he had to choose between two things he adopted the easier one, provided it was nor sin, but if it was any sin he was the one who was the farthest from it of the people; and Allah's Messenger (may peace be upon him) never took revenge from anyone because of his personal grievance, unless what Allah, the Exalted and Glorious, had made inviolable had been violated.