Matthew 4:10

Then Jesus said to him: "Begone, Satan! for Scripture says-- 'Thou shalt do homage to the Lord thy God, and worship him only.'"

Luke 4:8

And Jesus answered him: "Scripture says--'Thou shalt do homage to the Lord thy God, and worship him only.'"

Matthew 6:24

No one can serve two masters, for either he will hate one and love the other, or else he will attach himself to one and despise the other. You cannot serve both God and Money.

Matthew 15:8

'This is a people that honor me with their lips, While their hearts are far removed from me;

John 4:24

God is Spirit; and those who worship him must worship spiritually and truly."

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 that honor me with their lips, While their hearts are far removed from me;
John 4:24
God is Spirit; and those who worship him must worship spiritually and truly."

Serve him

Matthew 4:10
Then Jesus said to him: "Begone, Satan! for Scripture says-- 'Thou shalt do homage to the Lord thy God, and worship him only.'"
Matthew 6:24
No one can serve two masters, for either he will hate one and love the other, or else he will attach himself to one and despise the other. You cannot serve both God and Money.
Luke 4:8
And Jesus answered him: "Scripture says--'Thou shalt do homage to the Lord thy God, and worship him only.'"