Deuteronomy 10:14-16

Behold, the heavens and the highest of heavens belong to the LORD your God, the earth and all that is in it. Yet the LORD had a delight in loving your fathers and set His affection on them, and He chose their descendants after them, you above all peoples, as it is this day. So circumcise [that is, remove sin from] your heart, and be stiff-necked (stubborn, obstinate) no longer.