New Revised Standard Version
Then you shall keep the festival of weeks to the LORD your God, contributing a freewill offering in proportion to the blessing that you have received from the LORD your God.

New American Bible
You shall then keep the feast of Weeks for the LORD, your God, and the measure of your own voluntary offering which you will give shall be in proportion to the blessing the LORD, your God, has given you.

Douay-Rheims Bible
And thou shalt celebrate the festival of weeks to the Lord thy God, a voluntary oblation of thy hand, which thou shalt offer according to the blessing of the Lord thy God.

And thou shalt celebrate the festival of weeks to the Lord thy God, a voluntary oblation of thy hand, which thou shalt offer according to the blessing of the Lord thy God.

a tribute.

Deuteronomy 16:16 Three times in a year shall all thy males appear before the Lord thy God in the place which he shall choose: in the feast of unleavened bread, in the feast of weeks, and in the feast of tabernacles. No one shall appear with his hands empty before the Lord:

Leviticus 5:7 But if he be not able to offer a beast, let him offer two turtles, or two young pigeons to the Lord, one for sin, and the other for a holocaust,

Leviticus 12:8 And if her hand find not sufficiency, and she is not able to offer a lamb, she shall take two turtles, or two young pigeons, one for a holocaust, and another for sin: and the priest shall pray for her, and so she shall be cleansed.

Leviticus 25:26 But if he have no kinsman, and he himself can find the price to redeem it:

Numbers 31:28,37 And thou shalt separate a portion to the Lord from them that fought and were in the battle, one soul of five hundred as well of persons as of oxen and asses and sheep. . . .

Proverbs 3:9,10 And thy barns shall be filled with abundance, and thy presses shall run over with wine. . . .

according

Deuteronomy 16:17 But every one shall offer according to what he hath, according to the blessing of the Lord his God, which he shall give him.

Proverbs 10:22 A fool worketh mischief as it were for sport: but wisdom is prudence to a man.

Joel 2:14 Who knoweth but he will return, and forgive, and leave a blessing behind him, sacrifice and libation to the Lord your God?

Haggai 2:15-19 And now consider in your hearts, from this day and upward, before there was a stone laid upon a stone in the temple of the Lord. . . .

Malachi 3:10,11 Bring all the tithes into the storehouse, that there may be meat in my house, and try me in this, saith the Lord: if I open not unto you the flood-gates of heaven, and pour you out a blessing even to abundance. . . .

1 Corinthians 16:2 On the first day of the week, let every one of you put apart with himself, laying up what it shall well please him: that when I come, the collections be not then to be made.

2 Corinthians 8:10,12 And herein I give my advice: for this is profitable for you who have begun not only to do but also to be willing, a year ago. . . .

2 Corinthians 9:5-11 Therefore I thought it necessary to desire the brethren that they would go to you before and prepare this blessing before promised, to be ready, so as a blessing, not as covetousness. . . .