'Free will' in the Bible

But, if, a vow or a freewill offering, be his sacrifice of oblation, in the day he bringeth near his sacrifice, shall it be eaten, and on the morrow, then may the remainder thereof, be eaten;

Speak unto Aaron, and unto his sons, and unto all the sons of Israel, and thou shalt say unto them - What man, soever, of the house of Israel, or of the sojourners in Israel, may bring near his oblation, as regardeth any of their vows, or any of their freewill offerings which they may bring near unto Yahweh, as an ascending-sacrifice,

And, whosoever would bring near a peace-offering unto Yahweh, to consecrate a vow or as a freewill-offering with a bullock or a sheep, without defect, shall it be, to be accepted, no, blemish, shall be therein.

Whether an ox or a lamb long or short limb, as a free-will offering, thou mayest offer it, but, for a vow, it shall not he accepted.

besides the sabbaths of Yahweh, and besides your presents, and besides all your vows, and besides all your freewill offerings which ye shall give unto Yahweh.