'Willingly' in the Bible

gold for the golden things and silver for the silver things, for all the work by the hand of skilled craftsmen. Now who will offer willingly, {consecrating himself} today to Yahweh?"

Then the commanders of the {families}, the commanders of the tribes of Israel, and the commanders of thousands and hundreds, and the commanders of the work of the king offered themselves willingly.

And the people rejoiced over their freewill offering, for with a whole heart they had willingly offered to Yahweh, and King David also rejoiced with great joy.

And indeed, who [am] I, and who [are] my people that we retain power to offer according to these [offerings] willingly? For everything [is] from you, and from your hand we have given to you.

And I know, my God, that you yourself test the heart and are pleased with uprightness. I, in the uprightness of my heart, have willingly offered all these [things], and now I have seen your people who are found here willingly offer to you.