I took a holy vow.

Your holiest vow is just words to them.

"I would like to heed the wishes of my people, Mother, but I took a holy vow."

He need not break his holy vow.

That's a holy vow.

"And so a holy vow has the perverse effect of inspiring regrets."

Crazed they might be, but the religious maniacs could be trusted to keep their word, if they took a holy vow.

"Keep your heart content and cherish compassion for others; this way alone can your holy vow be fulfilled" (GG 299).

Then each of the novices pledged her life to the service of the community, taking a holy vow which the abbess administered with solemn approval.

Yet the great knight in his mid-sickness made Full many a holy vow and pure resolve.