3 That same day the man of God gave a sign: “This is the sign the LORD has declared: The altar will be split apart and the ashes on it will be poured out.”

Read 1 Kings 13:3 Using Other Translations

And he gave a sign the same day, saying, This is the sign which the LORD hath spoken; Behold, the altar shall be rent, and the ashes that are upon it shall be poured out.
And he gave a sign the same day, saying, "This is the sign that the LORD has spoken: 'Behold, the altar shall be torn down, and the ashes that are on it shall be poured out.'"
That same day the man of God gave a sign to prove his message. He said, “The LORD has promised to give this sign: This altar will split apart, and its ashes will be poured out on the ground.”