Hashem will never reject Yisrael
VaYikra 26.44 And yet for all that, when they are in the land of their enemies, I WILL NOT REJECT THEM, neither will I abhor them, to destroy them utterly, and to break My covenant with them; for I am Hashem their G-d.
Yirmeyahu 30.11 For I am with you, says Hashem, to save you; for I will make a full end of all the nations wither I have scattered you, but I will not make a full end of you, for I WILL CORRECT YOU IN MEASURE, and will not utterly destroy you.
Yirmeyahu 31.35-37 Thus says Hashem, Who gives the sun for a light by day, and the ordinances of the moon and of the stars for a light by night, who stirs up the sea, that the waves thereof roar, Hashem of hosts is His Name: If these ordinances depart from before Me, says Hashem, then the seed of Yisrael also shall cease from being a nation before Me for ever. Thus says Hashem: If heaven above can be measured, and the foundations of the earth searched out beneath, then will I also cast off all the seed of Yisrael for all that they have done, says Hashem .