כֹּ֤ה אָמַר֙ יְהוָ֣ה צְבָא֔וֹת פָּקַ֕דְתִּי אֵ֛ת אֲשֶׁר־עָשָׂ֥ה עֲמָלֵ֖ק לְיִשְׂרָאֵ֑ל אֲשֶׁר־שָׂ֥ם לוֹ֙ בַּדֶּ֔רֶךְ בַּעֲלֹת֖וֹ מִמִּצְרָֽיִם׃
Thus saith the LORD of hosts: I remember that which Amalek did to Israel, how he set himself against him in the way, when he came up out of Egypt.
Read kabbalistic (mystical) interpretation of I Samuel 15:2: and classical mystical sources.