"And you're certain your father kept his vow of silence?"

"I just haven't figured out how to keep my vow," the mage said.

No one would remember the single knight who had kept his vow the only way he knew how.

Gray had kept his vow to leave her a virgin.

I had kept my vow, made in the watery depths.

Oh, God, how was she ever going to be able to carry this off and keep her vow?

She would lose him unless she could keep her vow.

He hoped to God he possessed the will to keep his vow.

Ben and Nicky were going to keep their vow with them.

The General had kept his vow and was implementing the plan they had worked on together.