Deuteronomy 6:14-17

14Do not follow other gods, the gods of the peoples around you; 15for the LORD your God, who is among you, is a jealous God and his anger will burn against you, and he will destroy you from the face of the land. 16Do not put the LORD your God to the test as you did at Massah. 17Be sure to keep the commands of the LORD your God and the stipulations and decrees he has given you.