'Pledged' in the Bible

then bring to the place that the LORD your God will choose as a dwelling place where he will establish his name everything that I'm commanding you: your burnt offerings, your sacrifices, your tithes, your hand-carried gifts, and all your best offerings in fulfillment of promises that you pledged to the LORD.

"You won't be allowed to eat your tithe of grain, new wine, oil, the firstborn of your herd and flock, your voluntary offerings that you pledged, your free-will offerings, and the works of your hands in your own cities.