Matthew 11:2
Now when John had heard in the prison the works of Christ, he sent two of his disciples,
Nave's Topical Index—AKJV

Matthew 14:3-12
For Herod had laid hold on John, and bound him, and put him in prison for Herodias' sake, his brother Philip's wife.
Nave's Topical Index—AKJV

Mark 6:17
For Herod himself had sent forth and laid hold on John, and bound him in prison for Herodias' sake, his brother Philip's wife: for he had married her.
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Luke 3:20
Added yet this above all, that he shut up John in prison.
Nave's Topical Index—AKJV