'Freewill Offering' in the Bible

Every survivor, at whatever place he may live, let the men of that place support him with silver and gold, with goods and cattle, together with a freewill offering for the house of God which is in Jerusalem.’”

All those about them encouraged them with articles of silver, with gold, with goods, with cattle and with valuables, aside from all that was given as a freewill offering.

and afterward there was a continual burnt offering, also for the new moons and for all the fixed festivals of the Lord that were consecrated, and from everyone who offered a freewill offering to the Lord.

with all the silver and gold which you find in the whole province of Babylon, along with the freewill offering of the people and of the priests, who offered willingly for the house of their God which is in Jerusalem;

Then I said to them, “You are holy to the Lord, and the utensils are holy; and the silver and the gold are a freewill offering to the Lord God of your fathers.