'Pledged' in the Bible

And his honourable one hath been of himself, And his ruler from his midst goeth forth, And I have caused him to draw near, And he hath drawn nigh unto Me, For who is he who hath pledged his heart To draw nigh unto Me? An affirmation of Jehovah.

“Go to the house of the Rechabites and speak to them, and bring them into the house of the Lord, into one of the [side] chambers; then give them [who are pledged not to drink wine] some wine to drink.”