Luke
Luke 3:19BSB·traditional attribution

But when he rebuked Herod the tetrarch regarding his brother’s wife Herodias and all the evils he had done,

John Calvin Reformed @genevareformer

Luke 3:19. Now Herod the tetrarch. Luke alone explains the reason why Herod threw John into prison: though we shall afterwards find it mentioned by Matthew 14:3, and Mark 6:17. Josephus says, (Ant. 18, v. 2,) that Herod, dreading a popular insurrection and a change of the government, shut up John in the castle of Macherus, (because he dreaded the man’s influence;) “Pource qu'il savoit...

Matthew Henry Presbyterian @wholebiblehenry

We are now drawing near to the appearance of our Lord Jesus publicly; the Sun will not be long after the morning-star. We are here told, I. How the people took occasion, from the ministry and baptism of John, to think of the Messiah, and to think of him as at the door, as now come.

Commenting on Luke 3:15-20

John Gill Reformed Baptist @doctorgill

Added yet this above all,.... This sin to all other sins, and which was of a more flagitious nature; and attended with more aggravating circumstances, especially in the issue of it: that he shut up John in prison; in the castle of Machaerus, by the instigation of Herodias; See Gill on Mat 14:3.