'House of Israel' in the Bible

And Rehoboam came to Jerusalem; and he assembled all the house of Judah, with the tribe of Benjamin, a hundred and eighty thousand chosen men apt for war, to fight against the house of Israel, that he might bring the kingdom again to Rehoboam the son of Solomon.

And his servants said to him, Behold now, we have heard that the kings of the house of Israel are merciful kings: let us, I pray thee, put sackcloth on our loins, and ropes upon our heads, and go out to the king of Israel; perhaps he will save thy life.