Judges 11:2

“And Gilead’s wife bare him sons, etc.] It seems that, after the birth of Jephthah, Gilead took him a lawful wife, who bore him sons: and his wife’s sons grew up; to the estate of men: and they thrust out Jephthah: out of his father’s house, his father in all likelihood being dead, or he would not have suffered it, and what follows confirms it that he was dead: and said unto him, thou shalt not inherit in our father’s house: as he might not, if the son of an harlot, or of a woman of another tribe, or of a concubine; though as Kimchi, from their Rabbins, observes, the son of such an one might, provided his mother was not an handmaid nor a stranger. And it looks as if this was not rightly done,…”

“Thou shalt not inherit in our father's house--As there were children by the legitimate wife, the son of the secondary one was not entitled to any share of the patrimony, and the prior claim of the others was indisputable. Hence, as the brothers of Jephthah seem to have resorted to rude and violent treatment, they must have been influenced by some secret ill-will.”

“thrust out: Gen 12:10; Deu 23:2; Gal 4:30 a strange: Pro 2:16, Pro 5:3, Pro 5:20, Pro 6:24-26 Judges 11:3”