Qur’an 2:54

And remember Moses said to his people: ”O my people! you have indeed wronged yourselves by your worship of the calf: so turn (in repentance) to your Maker, and slay yourselves (the wrong-doers); that will be better for you in the sight of your Maker.” Then He turned toward you (in forgiveness): for He is Oft-Returning, Most Merciful.