The narrator states that a man came to his brother, Sayyiduna Artat bin al-Mundhir al-Sakuni (may Allah be pleased with him), and said: We have a neighbour who drinks wine and commits shameful deeds; should his case be reported to the ruler? He said: "I killed ninety-nine of the polytheists in front of the Messenger of Allah (peace and blessings be upon him); it would not please me to kill as many more as them and to expose the covering of a Muslim."
Hadith Referenceالمعجم الكبير للطبراني / باب الألف / 994