"And the LORD rained" (Genesis 19:24). "Like a snail that melts as it goes, like the untimely birth of a woman that has not seen the sun" (Psalms 58:9). Like this snail that is dissolved away in slime, like this mole that does not have time enough to see the sun before it returns to its dust.
Sodom Dissolved Like a Snail That Melts Away
Yalkut Shimoni on Torah 84:10
וַה' הִמְטִיר, "כְּמוֹ שַׁבְּלוּל תֶּמֶס יַהֲלֹךְ נֵפֶל אֵשֶׁת בַּל חָזוּ שָׁמֶשׁ", כַּהֲדָא סִלֵיי בִּלֵיי כְּשִׁלְשׁוּל זֶה שֶׁהוּא נִמְחָה בְּצוֹאָה כְּאִשׁוּת הַזֹּאת שֶׁהִיא אֵינָה מַסְפֶּקֶת לִרְאוֹת שֶׁמֶשׁ עַד שֶׁהִיא חוֹזֶרֶת לַעֲפָרָהּ.