'Willing' in the Bible

But Yahweh was not willing to destroy the house of David on account of the covenant that he had {made} with David and since he had promised to give a lamp to him and to his descendants {forever}.

Then Hezekiah answered and said, "Now {you have consecrated yourselves} to Yahweh. Come near and bring sacrifices and thank offerings to the house of Yahweh!" And the assembly brought sacrifices and thank offerings, and all [who were] willing in heart [brought] burnt offerings.