Matthew 4:10
Then Jesus said to him, "Be gone, Satan! For the Scripture says, 'You must worship the Lord your God, and serve Him alone.'"
Luke 4:8
But Jesus answered him, "The Scripture says, 'You must worship the Lord your God, and serve Him alone.'"
Matthew 6:24
No one can be a slave to two masters, for either he will hate one and love the other, or else he will be devoted to one and despise the other. You cannot be slaves of God and money.
Matthew 15:8
"'This people honor me with their lips, but their hearts are far, far away from me;
John 4:24
God is a spiritual Being, and His worshipers must worship Him in spirit and reality."