And he gave a sign the same day, saying, This is the sign which the LORD has spoken;
Behold, the altar shall be torn, and the ashes that are upon it shall be poured out.
Read Chapter 13
George Leo Haydock
AD 1849
Sign. This would take place immediately, to convince the king that what he had said would be accomplished. So Moses and Achaz were treated, Exodus iii. 2, 12., and Isaias vii. 14, 16. (Calmet)