Matthew 4:10
Then Jesus saith to him, Get thee hence, Satan; for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.
Luke 4:8
And Jesus answering said to him, Get thee hence, Satan; for it is written, Thou shalt worship the Lord thy God, and him only shalt thou serve.
Matthew 6:24
No man can serve two masters: for either he will hate the one and love the other, or he will cleave to the one and neglect the other.
Matthew 15:8
This people draweth nigh to me with their mouth, and honoureth me with their lips; but their heart is far from me.
John 4:24
God is a spirit, and they that worship him, must worship him in spirit and in truth.