Mark 11:26-30

But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.

And they come again to Jerusalem: and as he was walking in the temple, there come to him the chief priests, and the scribes, and the elders,

And say unto him, By what authority doest thou these things? and who gave thee this authority to do these things?

And Jesus answered and said unto them, I will also ask of you one question, and answer me, and I will tell you by what authority I do these things.

The baptism of John, was it from heaven, or of men? answer me.