en_tn/jdg/12/09.md

He gave away thirty daughters in marriage

Here "give away ... in marriage" is an idiom which means that he allowed his daughters to get married. Alternate translation: "He had thirty daughters and arranged a marriage for each of them" (See: rc://en/ta/man/translate/figs-idiom)

he brought in thirty daughters of other men for his sons, from the outside

The idiom "bring them in from the outside" means that he had women from other clans marry his sons. Alternate translation: "he arranged for thirty daughters of other men from outside of his clan to marry his sons" (See: rc://en/ta/man/translate/figs-idiom)