'Freely' in the Bible

Then the heads of families and the chiefs of the tribes of Israel, and the captains of thousands and of hundreds, with the controllers of the king's business, freely gave themselves;

Then the people were glad because their offerings were freely given, for with a true heart they freely gave what they had to the Lord; and David the king was full of joy.

But who am I and what is my people, that we have power to give so freely in this way? for all things come from you, and what we have given you is yours.

And I am conscious, my God, that you are the searcher of hearts, taking pleasure in righteousness. As for me, with an upright heart I have freely given all these things; and I have seen with joy your people who are here to make their offerings freely to you.