'Freely' in the Bible

Then the people rejoiced because they had given willingly, for with a whole and blameless heart they had offered freely to the Lord. King David also rejoiced greatly.

I know also, my God, that You test the heart and delight in uprightness and integrity. In the uprightness of my heart I have willingly offered all these things. So now with joy I have seen Your people who are present here, make their offerings willingly and freely to You.