Another interpretation: "Make for yourself a covering" [reading the silver gift as a veil], so that all would look at the covering and not at her beauty. He took a royal garment and clothed her in it, and made her into a noblewoman. And why? So that no man would demand her, but rather they would hear that she is a queen and be afraid to demand her, since she is covered from the eye. Resh Lakish said: He sought to provoke her against her husband, as if to say: all these years she was with him and he did nothing for her, yet she was with this one for a single night and he did her all this honor.
The Royal Veil Abimelech Gave Sarah and the Rebuke Hidden In It
Yalkut Shimoni on Torah 91:2
דָּבָר אַחֵר, עֲשֵׂה לְךָ כְּסוּת, שֶׁיִּהְיוּ הַכֹּל מַבִּיטִין בּוֹ בַּכְּסוּת וְלֹא בְּיָפְיָהּ, נָטַל לְבוּשׁ מַלְכוּת וְהִלְבִּישָׁהּ, וַעֲשָׂאָה מַטְרוּנָא וְלָמָה, כְּדֵי שֶׁלֹּא יִתְבַּע אָדָם אוֹתָה אֶלָּא יְהוּ שׁוֹמְעִין שֶׁהִיא מַלְכָּה, וּמִתְיָרְאִין לִתְבֹּעַ אוֹתָה, שֶׁהִיא מְכוּסָה מִן הָעַיִן. רֵישׁ לָקִישׁ אָמַר, בִּקֵּשׁ לְהַקְנוֹתָהּ בִּפְנֵי בַּעֲלָהּ, לוֹמַר כָּל הַשָּׁנִים הַלָּלוּ הָיְתָה עִמּוֹ, וְלֹא עָשָׂה לָה דָּבָר, וְזֶה הָיְתָה עִמּוֹ לַיְלָה אַחַת וְעָשָׂה לָה כָּל הַכָּבוֹד הַזֶּה.