Midrasz do Samuela II 1:16

(Deut. 25:19:) “And it shall come to pass when the Lord your God grants you rest [… you shall blot out the remembrance of Amalek].” R. Azariah and R. Judah bar Simon said in the name of R. Judah bar Il'ay, “Israel was given three commandments on their entrance to the land:⁵⁸PRK 3:14; PR 12:13; Sanh. 20b (bar.) To appoint a king over themselves, as written (in Deut. 17:15), ‘You shall surely place a king over yourself.’ To build the Temple, as written (in Exod. 25:8), ‘And make Me a sanctuary.’ To cut off the seed of Amalek, as stated (in Deut. 25:19), ‘[…] you shall blot out the remembrance of Amalek.’” R. Joshua ben Levi [said] in the name of R. Alexandri, “One text says (in Deut. 25:19), ‘you shall blot out the remembrance of Amalek,’ while another text says (in Exod. 17:14), ‘I will utterly blot out the remembrance of Amalek.’⁵⁹PRK 3:15. How are these two texts to be harmonized? Before [the Amalekites] raised their hands against the [heavenly] throne, ‘you shall blot out.’ When they had raised their hands against the [heavenly] throne, ‘I will blot out.’” Can flesh and blood possibly raise its hand against the throne of the Holy One, blessed be He? It is simply because they destroyed Jerusalem, since it is written (in Jer. 3:17), “For at that time they shall call Jerusalem the throne of the Lord.” It is therefore written (in Exod. 17:14), “I will utterly blot out.” And it is stated (Exod. 17:16), “Because a hand is upon the throne of the Lord, the Lord has a war [with Amalek from generation to generation].” It is taught in the name of R. Il'ay: The Holy One, blessed be He, swore an oath and said, “[By] My right hand, [by] My right hand, [by] My throne, [by] My throne, [I swear that] if gentiles come from any of the peoples, them I will accept; but those from the seed of Amalek I will not accept.”⁶⁰PRK 3:16; PR 12:9; Mekhilta deRabbi Ishmael, ‘Amaleq, 2. And David also acted in this way, as stated (in II Sam. 1:13), “And David said unto the young man who had told him, ‘Where do you come from?’ Then he said, ‘I am the son of an Amalekite proselyte.’”⁶¹GeR. The word denoted a resident alien in biblical times, but in rabbinic literature the word denotes a proselyte. R. Isaac said, “He was the son of Doeg the Edomite.” (II Sam. 1:16:) “Then David said to him, ‘Your blood be upon your own head […].’” [This is what one reads, but] the written text (ketiv) is “Your bloods,” [meaning] You shed a lot of bloods; you killed [the inhabitants of] Nob, the city of priests .(Exod. 17:16:) “From generation to generation.” The Holy One, blessed be He, said, “’From generation to generation,’ I am [keeping] after them (i.e., after the Amalekites) for generations of generations.” R. Eliezer, R. Joshua, and R. Jose differ. R. Eliezer says, “From the generation of Moses to the generation of Samuel.” R. Joshua says, “From the generation of Samuel to the generation of Mordecai and Esther.” And R. Jose says, “From the generation of Mordecai and Esther to the generation of the messianic king, which itself equals three generations.” And where is it shown that the generation of the messianic king equals three generations?⁶²See Sanh. 99a. Where it is stated (of the messianic king in Ps. 72:5), “Let them fear You as long as the sun endures and as long as the moon, for a generation and generations.” [The singular] generation equals one, [and the plural] generations equals two, for a total of three. R. Berekhyah said in the name of R. Abba bar Kahana, “As long as the seed of Amalek remains alive in the world, it is as though a wing (kanaf) is hiding the [divine] face.⁶³See Is. 6:2. When the seed of Amalek has passed from the world, (in Is. 30:20), “your Teacher (i.e., the Holy One, blessed be He,) will no longer be hidden (yikanef).” R. Levi says in the name of R. Hama bar Hanina, “As long as the seed of Amalek is in the world, the [divine] name will not be at peace (literally, whole) and the [divine] throne will not be at peace. When the seed of Amalek passes from the world, the throne will be at peace, and the name will be at peace.” What is the evidence? That which is stated (in Ps. 9:7), “The enemy is no more, in everlasting ruins, [and you have uprooted their cities, their very memory has perished].” What is written after that (in vs. 8), “But the Lord sits [enthroned] forever; He has established His throne for judgment.” Ergo, the name is at peace, and the throne is at peace. Amen, and so may it be His will!