Matthew 14:7-8

14:7 so much that he promised with an oath to give her whatever she asked. 14:8 Instructed by her mother, she said, “Give me the head of John the Baptist here on a platter.”

tn The Greek text reads here ὁμολογέω (Jomologew); though normally translated “acknowledge, confess,” BDAG (708 s.v. 1) lists “assure, promise with an oath” for certain contexts such as here.