'House of Israel' in the Bible

For, finding fault with them, he says: Behold, the days are coming, says the Lord, when I will ratify a new covenant for the house of Israel, and for the house of Judah:

For this is the covenant that I will make with the house of Israel, after those days, says the Lord; putting my laws into their understanding, I will also write them upon their hearts; and I will be to them a God, and they shall be to me a people;