Matthew Poole and continuators on Job 42:15

15. And in all the land were no women found so fair as the daughters of Job: and their father gave them inheritance among their brethren.

Gave his Daughters a share, and possibly an equal share with his Sons in his Inheritance: which in so plentiful an estate he might easily do, especially to such amiable Sisters without the envy of their Brethren: and which peradventure he did to oblige them to settle themselves amongst their Brethren, and to marry into their own Religious Kindred, not to Strangers, who in those times were generally swallowed up in the gulf of Idolatry.