'Freely' in the Bible

Here's a list of those who came to David at Ziklag when he was unable to travel freely due to Saul son of Kish. They were among the elite soldiers who assisted him in battle.

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 rejoiced because they had given voluntarily, since with a devoted heart they had freely given to the LORD.

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 know, God, that it is you who searches the heart and you who finds pleasure in righteousness. With a righteous heart I have freely given all these things, and now I have seen all of these people of yours giving freely and joyfully to you!