'Free will offering' in the Bible

The children of Israel brought a freewill-offering unto Jehovah; every man and woman, whose heart made them willing to bring for all the work, which Jehovah had commanded to be made by Moses.

But if the sacrifice of his oblation be a vow, or a freewill-offering, it shall be eaten on the day that he offereth his sacrifice; and on the morrow that which remaineth of it shall be eaten:

And whosoever offereth a sacrifice of peace-offerings unto Jehovah to accomplish a vow, or for a freewill-offering, of the herd or of the flock, it shall be perfect to be accepted; there shall be no blemish therein.

Either a bullock or a lamb that hath anything superfluous or lacking in his parts, that mayest thou offer for a freewill-offering; but for a vow it shall not be accepted.

then ye have prepared a fire-offering to Jehovah, a burnt-offering, or a sacrifice, at separating a vow or free-will-offering, or in your appointed things, to make a sweet fragrance to Jehovah, out of the herd, or out of the flock.

And thou shalt keep the feast of weeks unto Jehovah thy God with a tribute of a freewill-offering of thy hand, which thou shalt give, according as Jehovah thy God blesseth thee:

The produce of thy lips thou dost keep, and hast done it, as thou hast vowed to Jehovah thy God; a free-will-offering, which thou hast spoken with thy mouth.

And his princes gave for a freewill-offering unto the people, to the priests, and to the Levites. Hilkiah and Zechariah and Jehiel, the rulers of the house of God, gave unto the priests for the passover-offerings two thousand and six hundred'small cattle , and three hundred oxen.

And whosoever is left, in any place where he sojourneth, let the men of his place help him with silver, and with gold, and with goods, and with beasts, besides the freewill-offering for the house of God which is in Jerusalem.

and afterward the continual burnt-offering, and the offerings of the new moons, and of all the set feasts of Jehovah that were consecrated, and of every one that willingly offered a freewill-offering unto Jehovah.

and all the silver and gold that thou shalt find in all the province of Babylon, with the freewill-offering of the people, and of the priests, offering willingly for the house of their God which is in Jerusalem;

And I said unto them, Ye are holy unto Jehovah, and the vessels are holy; and the silver and the gold are a freewill-offering unto Jehovah, the God of your fathers.

With a free will-offering I sacrifice to Thee, I thank Thy name, O Jehovah, for it is good,

And when the prince shall prepare a freewill-offering, a burnt-offering or peace-offerings as a freewill-offering unto Jehovah, one shall open for him the gate that looketh toward the east; and he shall prepare his burnt-offering and his peace-offerings, as he doth on the sabbath day: then he shall go forth; and after his going forth one shall shut the gate.