New Revised Standard Version
But if the sacrifice you offer is a votive offering or a freewill offering, it shall be eaten on the day that you offer your sacrifice, and what is left of it shall be eaten the next day;

Contemporary English Version
It is different with the sacrifices you offer when you make me a promise or voluntarily give me something. The meat from those sacrifices may be kept and eaten the next day,

New American Bible
However, if the sacrifice offered is a votive or a voluntary offering, it shall be eaten on the day the sacrifice is offered, and on the next day what is left over may be eaten.

Douay-Rheims Bible
If any man by vow, or of his own accord offer a sacrifice, it shall in like manner be eaten the same day. And if any of it remain until the morrow, it is lawful to eat it.

If any man by vow, or of his own accord offer a sacrifice, it shall in like manner be eaten the same day. And if any of it remain until the morrow, it is lawful to eat it.

be a vow

Leviticus 22:18-21 Speak to Aaron, and to his sons, and to all the children of Israel, and thou shalt say to them: The man of the house of Israel, and of the strangers who dwell with you, that offereth his oblation, either paying his vows, or offering of his own accord, whatsoever it be which he presenteth for a holocaust of the Lord, . . .

Leviticus 23:38 Besides the sabbaths of the Lord, and your gifts, and those things that you offer by vow, or which you shall give to the Lord voluntarily.

Numbers 15:3 And shall make an offering to the Lord, for a holocaust, or a victim, paying your vows, or voluntarily offering gifts, or in your solemnities burning a sweet savour unto the Lord, of oxen or of sheep:

Deuteronomy 12:6,11,17,26 And you shall offer in that place your holocausts and victims, the tithes and firstfruits of your hands and your vows and gifts, the firstborn of your herds and your sheep. . . .

Psalm 66:13 I will go into thy house with burnt offerings: I will pay thee my vows,

Psalm 116:14,18 I will pay my vows to the Lord before all his people: . . .

Nahum 1:15 Behold upon the mountains the feet of him that bringeth good tidings, and that preacheth peace: O Juda, keep thy festivals, and pay thy vows: for Belial shall no more pass through thee again, he is utterly cut off.

a voluntary

Leviticus 22:23,29 An ox or a sheep, that hath the ear and the tail cut off, thou mayst offer voluntarily: but a vow may not be paid with them. . . .

Deuteronomy 12:6 And you shall offer in that place your holocausts and victims, the tithes and firstfruits of your hands and your vows and gifts, the firstborn of your herds and your sheep.

Ezekiel 46:12 But when the prince shall offer a voluntary holocaust, or voluntary peace offering to the Lord: the gate that looketh towards the east shall be opened to him, and he shall offer his holocaust, and his peace offerings, as it is wont to be done on the sabbath day: and he shall go out, and the gate shall be shut after he is gone forth.

also the

Leviticus 19:5-8 If ye offer in sacrifice a peace offering to the Lord, that he may be favourable: . . .