Exodus 25:2

Say to the children of Israel that they are to make me an offering; from every man who has the impulse in his heart take an offering for me.

Ezra 2:68

And some of the heads of families, when they came to the house of the Lord which is in Jerusalem, gave freely of their wealth for the building up of the house of God in its place:

2 Corinthians 9:7

Let every man do after the purpose of his heart; not giving with grief, or by force: for God takes pleasure in a ready giver.

Ezra 1:6

And all their neighbours gave them help with offerings of vessels of silver and gold and goods and beasts and things of great value, in addition to what was freely offered.

Ezra 3:5

And after that, the regular burned offering and the offerings for the new moons and all the fixed feasts of the Lord which had been made holy, and the offering of everyone who freely gave his offering to the Lord.

Ezra 7:16

As well as all the silver and gold which you get from the land of Babylon, together with the offering of the people and of the priests, freely given for the house of their God, which is in Jerusalem:

Nehemiah 11:2

And the people gave a blessing to all the men who were freely offering to take up their places in Jerusalem.

Exodus 35:4-29

And Moses said to all the meeting of the children of Israel, This is the order which the Lord has given:

Numbers 7:3-88

And they came with their offerings before the Lord, six covered carts and twelve oxen; a cart for every two of the chiefs, and for every one an ox.

Numbers 18:24

For the tenths which the children of Israel give as a lifted offering to the Lord I have given to the Levites as their heritage. and so I have said to them, Among the children of Israel they will have no heritage.

Deuteronomy 16:16-17

Three times in the year let all your males come before the Lord your God in the place named by him; at the feast of unleavened bread, the feast of weeks, and the feast of tents: and they are not to come before the Lord with nothing in their hands;

Judges 5:9

Come, you rulers of Israel, you who gave yourselves freely among the people: give praise to the Lord.

1 Chronicles 29:1-30

And David the king said to all the people, Solomon my son, the only one who has been marked out by God, is still young and untested, and the work is great, for this great house is not for man, but for the Lord God.

2 Corinthians 8:11-12

Then make the doing of it complete; so that as you had a ready mind, you may give effect to it as you are able.

Treasury of Scripture Knowledge

Summary

Speak unto the children of Israel, that they bring me an offering: of every man that giveth it willingly with his heart ye shall take my offering.

General references

Bible References

They

Exodus 35:5
Take from among you an offering to the Lord; everyone who has the impulse in his heart, let him give his offering to the Lord; gold and silver and brass;
Numbers 7:3
And they came with their offerings before the Lord, six covered carts and twelve oxen; a cart for every two of the chiefs, and for every one an ox.
Deuteronomy 16:16
Three times in the year let all your males come before the Lord your God in the place named by him; at the feast of unleavened bread, the feast of weeks, and the feast of tents: and they are not to come before the Lord with nothing in their hands;

Willingly

Exodus 35:5
Take from among you an offering to the Lord; everyone who has the impulse in his heart, let him give his offering to the Lord; gold and silver and brass;
Judges 5:9
Come, you rulers of Israel, you who gave yourselves freely among the people: give praise to the Lord.
1 Chronicles 29:3
And because this house of God is dear to me, I give my private store of gold and silver to the house of my God, in addition to all I have got ready for the holy house;
Ezra 1:6
And all their neighbours gave them help with offerings of vessels of silver and gold and goods and beasts and things of great value, in addition to what was freely offered.
Ezra 2:68
And some of the heads of families, when they came to the house of the Lord which is in Jerusalem, gave freely of their wealth for the building up of the house of God in its place:
Ezra 3:5
And after that, the regular burned offering and the offerings for the new moons and all the fixed feasts of the Lord which had been made holy, and the offering of everyone who freely gave his offering to the Lord.
Ezra 7:16
As well as all the silver and gold which you get from the land of Babylon, together with the offering of the people and of the priests, freely given for the house of their God, which is in Jerusalem:
Nehemiah 11:2
And the people gave a blessing to all the men who were freely offering to take up their places in Jerusalem.
2 Corinthians 8:12
For if there is a ready mind, a man will have God's approval in the measure of what he has, and not of what he has not.
2 Corinthians 9:7
Let every man do after the purpose of his heart; not giving with grief, or by force: for God takes pleasure in a ready giver.

General references

Exodus 35:21
And everyone whose heart was moved, everyone who was guided by the impulse of his spirit, came with his offering for the Lord, for whatever was needed for the Tent of meeting and its work and for the holy robes.

Basic English, produced by Mr C. K. Ogden of the Orthological Institute - public domain