John Gill Commentary 2 Chronicles 21:17

"and they came up against Judah, and brake into it, and carried away all the substance that was found in the king`s house, and his sons also, and his wives; so that there was never a son left him, save Jehoahaz, the youngest of his sons." — 2 Chronicles 21:17 (ASV)

And they came up into Judah, and brake into it
l In an hostile manner:

and carried away all the substance that was found in the king's house ,
his gold, silver, and precious things, the rich furniture of his palace; no mention is made of any other plunder in the city, or the country; so that they seem to have had their principal eye to the king's palace, and the spoil of that; being so directed by the providence of God, who had stirred them up to do this as a punishment of Jehoram:

and his sons also, and his wives ;
these they also carried away, all but Athaliah, who hid herself; he through his disease not being able to make any opposition, or to get any forces together to withstand them:

so that there was never a son left him, save Jehoahaz ,
the youngest of his sons; the same that is called Ahaziah and Azariah, (2 Chronicles 22:1 2 Chronicles 22:6) so the prophecy in (2 Chronicles 21:14) was fulfilled.