Mark 11:26 in the King James Version
But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.
Context
25 Whenever you stand praying, forgive, if you have anything against anyone; so that your Father, who is in heaven, may also forgive you your transgressions.
26 But if you do not forgive, neither will your Father in heaven forgive your transgressions.”
27 They came again to Jerusalem, and as he was walking in the temple, the chief priests, the scribes, and the elders came to him,