Isaiah 6:6

6:6 But then one of the seraphs flew toward me. In his hand was a hot coal he had taken from the altar with tongs.

Isaiah 36:7

36:7 Perhaps you will tell me, ‘We are trusting in the Lord our God.’ But Hezekiah is the one who eliminated his high places and altars and then told the people of Judah and Jerusalem, ‘You must worship at this altar.’