[Gen 12:1-3 NASB] 1 Now the LORD said to Abram, "Go forth from your country, And from your relatives And from your father's house, To the land which I will show you; 2 And I will make you a great nation, And I will bless you, And make your name great; And so you shall be a blessing; 3 And I will bless those who bless you, And the one who curses you I will curse. And in you all the families of the earth will be blessed." ... 7 The LORD appeared to Abram and said, "To your seed I will give this land." So he built an altar there to the LORD who had appeared to him.
[Gal 3:6-9 NASB] 6 Even so Abraham BELIEVED GOD, AND IT WAS RECKONED TO HIM AS RIGHTEOUSNESS. 7 Therefore, be sure that it is those who are of faith who are sons of Abraham. 8 The Scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel beforehand to Abraham, [saying,] "ALL THE NATIONS WILL BE BLESSED IN YOU." 9 So then those who are of faith are blessed with Abraham, the believer.
This is the beginning of Abraham's covenant with God. Notice it starts with Abram as a great nation (singular), but by Genesis 17 God has changed his name to Abraham and the covenant of faith is to him as the "father of many nations." This promise to Abraham is everlasting. It has no end time.
[Num 23:5, 7-11, 13, 16, 18-25, 27 NASB] 5 Then the LORD put a word in Balaam's mouth and said, "Return to Balak, and you shall speak thus." ... 7 He took up his discourse and said, "From Aram Balak has brought me, Moab's king from the mountains of the East, 'Come curse Jacob for me, And come, denounce Israel!' 8 "How shall I curse whom God has not cursed? And how can I denounce whom the LORD has not denounced? 9 "As I see him from the top of the rocks, And I look at him from the hills; Behold, a people [who] dwells apart, And will not be reckoned among the nations. 10 "Who can count the dust of Jacob, Or number the fourth part of Israel? Let me die the death of the upright, And let my end be like his!" 11 Then Balak said to Balaam, "What have you done to me? I took you to curse my enemies, but behold, you have actually blessed them!" ... 13 Then Balak said to him, "Please come with me to another place from where you may see them, although you will only see the extreme end of them and will not see all of them; and curse them for me from there." ... 16 Then the LORD met Balaam and put a word in his mouth and said, "Return to Balak, and thus you shall speak." ... 18 Then he took up his discourse and said, "Arise, O Balak, and hear; Give ear to me, O son of Zippor! 19 "God is not a man, that He should lie, Nor a son of man, that He should repent; Has He said, and will He not do it? Or has He spoken, and will He not make it good? 20 "Behold, I have received [a command] to bless; When He has blessed, then I cannot revoke it. 21 "He has not observed misfortune in Jacob; Nor has He seen trouble in Israel; The LORD his God is with him, And the shout of a king is among them. 22 "God brings them out of Egypt, He is for them like the horns of the wild ox. 23 "For there is no omen against Jacob, Nor is there any divination against Israel; At the proper time it shall be said to Jacob And to Israel, what God has done! 24 "Behold, a people rises like a lioness, And as a lion it lifts itself; It will not lie down until it devours the prey, And drinks the blood of the slain." 25 Then Balak said to Balaam, "Do not curse them at all nor bless them at all!" ... 27 Then Balak said to Balaam, "Please come, I will take you to another place; perhaps it will be agreeable with God that you curse them for me from there."
[Num 24:3-10 NASB] 3 He took up his discourse and said, "The oracle of Balaam the son of Beor, And the oracle of the man whose eye is opened; 4 The oracle of him who hears the words of God, Who sees the vision of the Almighty, Falling down, yet having his eyes uncovered, 5 How fair are your tents, O Jacob, Your dwellings, O Israel! 6 "Like valleys that stretch out, Like gardens beside the river, Like aloes planted by the LORD, Like cedars beside the waters. 7 "Water will flow from his buckets, And his seed [will be] by many waters, And his king shall be higher than Agag, And his kingdom shall be exalted. 8 "God brings him out of Egypt, He is for him like the horns of the wild ox. He will devour the nations [who are] his adversaries, And will crush their bones in pieces, And shatter [them] with his arrows. 9 "He couches, he lies down as a lion, And as a lion, who dares rouse him? Blessed is everyone who blesses you, And cursed is everyone who curses you." 10 Then Balak's anger burned against Balaam, and he struck his hands together; and Balak said to Balaam, "I called you to curse my enemies, but behold, you have persisted in blessing them these three times!
It is not the spirit of God which pronounces curses on the nation of Israel... but the other spirit - the spirit of the devil. The gifts and calling of God are without repentance.
[Rom 11:6, 10-12, 15-18, 25-29 NASB] 6 But if it is by grace, it is no longer on the basis of works, otherwise grace is no longer grace. ... 10 "LET THEIR EYES BE DARKENED TO SEE NOT, AND BEND THEIR BACKS FOREVER." 11 I say then, they did not stumble so as to fall, did they? May it never be! But by their transgression salvation [has come] to the Gentiles, to make them jealous. 12 Now if their transgression is riches for the world and their failure is riches for the Gentiles, how much more will their fulfillment be! ... 15 For if their rejection is the reconciliation of the world, what will [their] acceptance be but life from the dead? 16 If the first piece [of dough] is holy, the lump is also; and if the root is holy, the branches are too. 17 But if some of the branches were broken off, and you, being a wild olive, were grafted in among them and became partaker with them of the rich root of the olive tree, 18 do not be arrogant toward the branches; but if you are arrogant, [remember that] it is not you who supports the root, but the root [supports] you. ... 25 For I do not want you, brethren, to be uninformed of this mystery--so that you will not be wise in your own estimation--that a partial hardening has happened to Israel until the fullness of the Gentiles has come in; 26 and so all Israel will be saved; just as it is written, "THE DELIVERER WILL COME FROM ZION, HE WILL REMOVE UNGODLINESS FROM JACOB." 27 "THIS IS MY COVENANT WITH THEM, WHEN I TAKE AWAY THEIR SINS." 28 From the standpoint of the gospel they are enemies for your sake, but from the standpoint of [God's] choice they are beloved for the sake of the fathers; 29 for the gifts and the calling of God are irrevocable.
Do not be arrogant toward the Jews...for they are the root and it is they and their covenant which supports you, not the other way around. Boxer you are cursed if you curse Israel... this is an irrevocable, eternal promise based on grace not works.
[Rom 4:16-17 NASB] 16 For this reason [it is] by faith, in order that [it may be] in accordance with grace, so that the promise will be guaranteed to all the descendants, not only to those who are of the Law, but also to those who are of the faith of Abraham, who is the father of us all, 17 (as it is written, "A FATHER OF MANY NATIONS HAVE I MADE YOU") in the presence of Him whom he believed, [even] God, who gives life to the dead and calls into being that which does not exist.