Isaiah 6:6-7

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. 6:7 He touched my mouth with it and said, “Look, this coal has touched your lips. Your evil is removed; your sin is forgiven.”

Isaiah 30:14

30:14 It shatters in pieces like a clay jar,

so shattered to bits that none of it can be salvaged.

Among its fragments one cannot find a shard large enough

to scoop a hot coal from a fire

or to skim off water from a cistern.”