Sunan An-Nasa'i

It was narrated from Ibn 'Abbas that :Some of the people of Shirk came to Muhammad [SAW] and said: ""What you say and call people to is good, if only you could tell us that there is any expiation for what we have done."" Then the Verses: ""And those who invoke not any other ilah (god) along with Allah, or kill such a person as Allah has forbidden, except by right."" And ""Say: O 'Ibadi (My slaves) who have transgressed against themselves (by committing evil deeds and sins)"" were revealed