took all Judah

This refers to all the men who live in Judah. Alternate translation: "took all the men of Judah" (See: rc://en/ta/man/translate/figs-metonymy)

timbers

Timbers are large pieces of wood used to build houses or walls.

Here "Baasha" refers to his workers. Alternate translation: "Baasha's workers had been" (See: rc://en/ta/man/translate/figs-metonymy)

"fortifying ... to fortify"

Here "King Asa" represents his workers. Alternate translation: "Then King Asa had his workers use" (See: rc://en/ta/man/translate/figs-metonymy)