Deuteronomy 6:13

6:13 You must revere the Lord your God, serve him, and take oaths using only his name.

Deuteronomy 11:16

Exhortation to Instruction and Obedience

11:16 Make sure you do not turn away to serve and worship other gods!

Deuteronomy 23:12

23:12 You are to have a place outside the camp to serve as a latrine.