Numbers 24:20

וירא את עמלק AND HE SAW AMALEK — i.e. He perceived the retribution destined to befall Amalek. ראשית גוים עמלק AMALEK WAS THE BEGINNING OF NATIONS — he was the first of them all to war against Israel; thus, too, does Onkelos translate it. ואחריתו BUT HIS LATTER END will be to be destroyed by their hands, as it is said, (Deuteronomy 25:19) “Thou shalt blot out the memory of Amalek”.

וַיַּרְא֙ אֶת־עֲמָלֵ֔ק וַיִּשָּׂ֥א מְשָׁל֖וֹ וַיֹּאמַ֑ר רֵאשִׁ֤ית גּוֹיִם֙ עֲמָלֵ֔ק וְאַחֲרִית֖וֹ עֲדֵ֥י אֹבֵֽד׃

And when he looked on ῾Amaleq, he took up his discourse, and said, ῾Amaleq was the first of the nations; but his latter end shall be everlasting perdition.