'Obligation' in the Bible

"When a man makes a vow to the LORD, or swears an oath an obligation that is binding to himself he is not to break his word. Instead, he is to fulfill whatever promise came out of his mouth.'"

"When a young woman makes a vow to the LORD or pledges herself to an obligation while she still lives in her father's house,

and her father hears her vow and the obligations that she had pledged herself to fulfill, yet her father keeps silent about it, then all her vows and every obligation she pledged herself to are to stand.

But if her father disallows her on the same day that he hears what she has said, then all her vows and every obligation she had pledged herself to fulfill are not to stand. The LORD will forgive her, because her father has forbidden her."

and her husband hears her vow, yet remains silent on the day that he hears it, then her vows are to stand and the obligation to which she had pledged herself is to stand.

and her husband hears it but remains silent, not disallowing it, then all her vows are to stand, along with every obligation that she has pledged to fulfill.

But if her husband disallowed them the very day that he heard her, everything that she spoke relating to her vows and her obligation to herself are not to stand, because her husband revoked them. The LORD will forgive her.

Her husband may confirm or revoke every vow and binding obligation that afflicts her.

You haven't abandoned your relatives these past days to the present, and you have met the obligation contained in the commands of the LORD your God.

By doing this, they will fulfill their obligation as trustees over the Tent of Assembly and the Sanctuary, attending to the needs of their relatives, who are descendants of Aaron, in keeping with their service on behalf of the Temple of the LORD."

"At the end of seven years, each of you is to set free your fellow Hebrew who has sold himself to you and has served you for six years. You are to send him out from you with no further obligation." But your ancestors didn't obey me or pay attention.