'Free will' in the Bible

and will make an offering by fire unto Jehovah, a burnt-offering, or a sacrifice, to accomplish a vow, or as a freewill-offering, or in your set feasts, to make a sweet savor unto Jehovah, of the herd, or of the flock;

These ye shall offer unto Jehovah in your set feasts, besides your vows, and your freewill-offerings, for your burnt-offerings, and for your meal-offerings, and for your drink-offerings, and for your peace-offerings.