'Free will' in the Bible

I will sacrifice a freewill offering to You.I will praise Your name, Yahweh,because it is good.

A shower of free-will gifts thou shakest out, O God. Thine inheritance, when it hath been weary, Thou hast established it.

Thy people are free-will gifts in the day of Thy strength, in the honours of holiness, From the womb, from the morning, Thou hast the dew of thy youth.

Accept, I beseech thee, the freewill offerings of my mouth, O LORD, and teach me thy judgments.