At that time Herod the tetrarch heard the report about Jesus.
References for Matthew 14:1
"This is John the Baptist!" he told his servants. "He has been raised from the dead, and that's why supernatural powers are at work in him."
For Herod had arrested John, chained him, and put him in prison on account of Herodias, his brother Philip's wife,
References for Matthew 14:3
since John had been telling him, "It's not lawful for you to have her!"
Though he wanted to kill him, he feared the crowd, since they regarded him as a prophet.
But when Herod's birthday celebration came, Herodias' daughter danced before them and pleased Herod.
References for Matthew 14:6
So he promised with an oath to give her whatever she might ask.
And prompted by her mother, she answered, "Give me John the Baptist's head here on a platter!"
Although the king regretted it, he commanded that it be granted because of his oaths and his guests.
So he sent orders and had John beheaded in the prison.
His head was brought on a platter and given to the girl, who carried it to her mother.
Then his disciples came, removed the corpse, buried it, and went and reported to Jesus.
References for Matthew 14:12