'Willing offering' in the Bible

and after this a continual burnt-offering, and for new moons, and for all appointed seasons of Jehovah that are sanctified; and for every one who is willingly offering a willing-offering to Jehovah.

And I say unto them, 'Ye are holy to Jehovah, and the vessels are holy, and the silver and the gold are a willing-offering to Jehovah, God of your fathers;