For, when Hashem finds fault with them, he says, "HINEH YAMIM BA'IM, NE'UM HASHEM, VKHARATI ES BEIS YISRAEL VES BEIS YEHUDAH BRIT CHADASHA"  "Behold, days are coming, says Hashem, when I will establish with the Beis Yisroel and with the Beis Yehudah a Brit Chadasha"