Deuteronomy 6:13

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

Deuteronomy 13:4

13:4 You must follow the Lord your God and revere only him; and you must observe his commandments, obey him, serve him, and remain loyal to him.

Matthew 4:10

4:10 Then Jesus said to him, “Go away, Satan! For it is written: ‘You are to worship the Lord your God and serve only him.’”

Luke 4:8

4:8 Jesus answered him, “It is written, ‘You are to worship the Lord your God and serve only him.’”