But if ye do not forgive, neither will your Father which is in heaven forgive your trespasses.(Mark 11:26)

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,(Mark 11:27)

And say unto him, By what authority doest thou these things? and who gave thee this authority to do these things?(Mark 11:28)

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.(Mark 11:30)

And they reasoned with themselves, saying, If we shall say, From heaven; he will say, Why then did ye not believe him?(Mark 11:31)

But if we shall say, Of men; they feared the people: for all men counted John, that he was a prophet indeed.(Mark 11:32)

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Mark 11:29 - Cross Reference

Behold, my servant shall deal prudently, he shall be exalted and extolled, and be very high. (Isaiah 52:13)

And he answered and said unto them, I will also ask you one thing; and answer me: (Luke 20:3)

And Jesus answered and said unto them, I also will ask you one thing, which if ye tell me, I in like wise will tell you by what authority I do these things. (Matthew 21:24)