John Gill Commentary Joshua 10:32

"and Jehovah delivered Lachish into the hand of Israel; and he took it on the second day, and smote it with the edge of the sword, and all the souls that were therein, according to all that he had done to Libnah." — Joshua 10:32 (ASV)

And the Lord delivered Lachish into the hand of Israel, which
he took on the second day
Either the second day from the slaughter of the kings, or rather the second day of the encampment or siege; so Kimchi: and

smote it with the edge of the sword, and all the souls that [were]
therein, according to all that he had done to Libnah ;
no mention is made of its king, because he was one of the five kings that had been hanged up; so that at the taking of this city there was no king.