Matthew 4:10

"Begone, Satan!" Jesus replied; "for it is written, 'To the Lord thy God thou shalt do homage, and to Him alone shalt thou render worship.'"

Luke 4:8

Jesus answered him, "It is written, 'To the Lord thy God thou shalt do homage, and to Him alone shalt thou render worship.'"

Matthew 6:24

"No man can be the bondservant of two masters; for either he will dislike one and like the other, or he will attach himself to one and think slightingly of the other. You cannot be the bondservants both of God and of gold.

Matthew 15:8

"'This is a People who honour Me with their lips, while their heart is far away from Me;

John 4:24

God is Spirit; and those who worship Him must bring Him true spiritual worship."

Treasury of Scripture Knowledge

Summary

And Samuel spake unto all the house of Israel, saying, If ye do return unto the LORD with all your hearts, then put away the strange gods and Ashtaroth from among you, and prepare your hearts unto the LORD, and serve him only: and he will deliver you out of the hand of the Philistines.

Bible References

Prepare

Matthew 15:8
"'This is a People who honour Me with their lips, while their heart is far away from Me;
John 4:24
God is Spirit; and those who worship Him must bring Him true spiritual worship."

Serve him

Matthew 4:10
"Begone, Satan!" Jesus replied; "for it is written, 'To the Lord thy God thou shalt do homage, and to Him alone shalt thou render worship.'"
Matthew 6:24
"No man can be the bondservant of two masters; for either he will dislike one and like the other, or he will attach himself to one and think slightingly of the other. You cannot be the bondservants both of God and of gold.
Luke 4:8
Jesus answered him, "It is written, 'To the Lord thy God thou shalt do homage, and to Him alone shalt thou render worship.'"