Parallel
Matthew 14:7
Patriarchal Greek New Testament (1904) · Berean Standard Bible
ὅθεν μεθ᾽ ὅρκου ὡμολόγησεν αὐτῇ δοῦναι ὃ ἐὰν αἰτήσηται.
so much that he promised with an oath to give to her whatever she asked.