The story of John's imprisonment:
Related Commentaries of Matthew 14:3
Matthew 14:3-5
3 For Herod had laid hold on John, and bound him, and put him in prison for Herodias' sake, his brother Philip's wife.
4 For John said unto him, It is not lawful for thee to have her.
5 And when he would have put him to death, he feared the multitude, because they counted him as a prophet.