Matthew 14:7-9

so that with an oath he promised to give her whatever she should ask.

Acts 23:14

So they came to the high-priests and elders, and said, We have bound ourselves by the direst imprecation, to taste nothing till we have killed Paul.

Treasury of Scripture Knowledge

Summary

And it came to pass, when he saw her, that he rent his clothes, and said, Alas, my daughter! thou hast brought me very low, and thou art one of them that trouble me: for I have opened my mouth unto the LORD, and I cannot go back.

Bible References

I cannot

Matthew 14:7
so that with an oath he promised to give her whatever she should ask.
Acts 23:14
So they came to the high-priests and elders, and said, We have bound ourselves by the direst imprecation, to taste nothing till we have killed Paul.