'Freely' in the Bible

All those who were around them encouraged them with articles of silver, with gold, with goods, with cattle, and with valuable things, in addition to all that was given as a freewill offering.

I have issued a decree that all of the people of Israel and their priests and the Levites in my kingdom who are willing to go to Jerusalem, may go with you.

and to bring [with you] the silver and gold which the king and his advisers have freely offered to the God of Israel, whose dwelling is in Jerusalem,