The accursed cannot cling to the blessed
Something cursed or evil cannot attach itself to something blessed and good.
("‘Cursed be Canaan...’ And since Abraham married Hagar the Egyptian, and the Egyptians were the children of Ham, it seems that Abraham himself was joined to the accursed. To this it is said that the curse was not upon Ham, as stated in the Midrash: since Ham had already been blessed by God, the accursed cannot cling to the blessed, and only Canaan was cursed." - Panim Yafot, Genesis 9:25)
Translation
Expression (Hebrew)
אֵין אָרוּר מִתְדַּפֵּק בְּבָרוּךְ
Definition (Hebrew)
אֵין דָּבָר רַע אוֹ מְקֻלָּל מִתְחַבֵּר לְדָבָר מְבֹרָךְ וְטוֹב.
("אָרוּר כְּנַעַן-...וְכֵיוָן דנשׁא אַבְרָהָם הַגָּר הַמִּצְרִית, וּמִצְרַיִם הָיוּ בָּנָיו שֶׁל חַם, הֲרֵי אַבְרָהָם עַצְמוֹ דֶּבֶק בְּאָרוּר, עַל זֶה אָמַר לוֹ שֶׁלֹּא הָיְתָה הַקְּלָלָה בֶּחָם, כְּמוֹ שֶׁנֶּאֱמַר בַּמִּדְרָשׁ, כֵּיוָן שֶׁכְּבָר נִתְבָּרֵךְ חַם מִפִּי הקב"ה אֵין אָרוּר מִתְדַּבֵּק בְּבָרוּךְ, וְלֹא קַלְּלוּ אֶלָּא אֶת כְּנַעַן"- פְּנִים יָפוֹת בְּרֵאשִׁית ט כֹה)