Numbers 30:2

If a man makes a vow to the LORD or swears an oath to obligate himself by a pledge, he must not break his word; he must do everything he has promised.

Berean Standard Bible, public domain. Read all of Numbers 30

One song meets this passage

“Promises never last forever”
I Want You Back · NSYNC
strains against Numbers 30:2
Scripture treats vows and promises as weighty and binding, standing in some tension with the casual cynicism of this line, even if it's just a youthful memory being recalled.