Luke 20:4

His question concerning John the Baptist is not from whence was he sprung, but whence received he his law of baptism But they feared not to shun the truth. For God sent John as a voice, crying, Prepare ye the way of the Lord. But they dreaded to speak the truth, lest it should be said, Why did ye not believe? and they scruple to blame the forerunner, not from fear of God, but of the people; as it follows, And they reasoned within themselves, saying, If we shall say, From, heaven; he will say, Why then believed ye him not.

As if He should say, He whom yon confess had his gift of prophecy from heaven, and gave testimony to Me. And ye heard from him by what power I should do these things. It follows, But if we shall say, Of men; the whole people will stone us: for they be persuaded that John was a prophet. Therefore perceived they in whatever way they should answer they would fall into a trap, fearing the stoning, but much more the confession of the truth.

For that He might show that they had always rebelled against the Holy Spirit, and that besides Isaiah, whom they remembered not, they had refused to believe John whom they had lately seen; He now in his turn puts the question to them, proving that if so great a Prophet as John who was accounted greatest among them had been disbelieved when he testified of Him, they would in no wise believe Him, answering by what authority He did this.