Pagar una Promesa Religiosa

Fulfill a vow.

He said he had made a vow to the Virgin of the Grotto and that he had finally fulfilled that vow on that day.

Reference in News:

"The Muslim family will also fulfill a vow to offer a toe made of silver at a dargah' as the girl has recovered completely."
Times of India.

"It also brings home the devastation Idomeneo causes his subjects by failing to fulfill his vow to Neptune and sacrifice his son."
New York Times.

Reference in Literature:

“When you make a vow to God, do not delay in fulfilling it. He has no pleasure in fools; fulfill your vow. It is better not to vow than to make a vow and not fulfill it. Do not let your mouth lead you into sin. And do not protest to the temple messenger, ‘My vow was a mistake.'”
Ecclesiastes 5:4-6