'Free will' in the Bible

And Kore the son of Imnah the Levite, the porter at the east gate , was over the freewill-offerings of God, to distribute the oblations of Jehovah, and the most holy things.

And his princes gave for a freewill-offering unto the people, to the priests, and to the Levites. Hilkiah and Zechariah and Jehiel, the rulers of the house of God, gave unto the priests for the passover-offerings two thousand and six hundred'small cattle , and three hundred oxen.