"Whom else have you here?" (Genesis 19:12) (this is written in remez 44 [a cross-reference]). From the rising of dawn until sunrise is five mil [a measure of distance], as it is written, "And as the dawn rose" (Genesis 19:15), and it is written, "The sun had risen over the earth, and Lot came to Zoar" (Genesis 19:23). And Rabbi Chanin said: I myself saw that place, and it was five mil.
The Distance from Sodom to Zoar Measured by the Dawn
Yalkut Shimoni on Torah 84:6
עֹד מִי לְךָ פֹה (כָּתוּב בְּרֶמֶז מ"ד). מֵעֲלוֹת הַשַּׁחַר עַד הַנֵּץ הַחַמָּה חֲמִשָּׁה מִילִין, דִּכְתִיב, וּכְמוֹ הַשַּׁחַר עָלָה וּכְתִיב (להלן פסוק כג) הַשֶּׁמֶשׁ יָצָא עַל הָאָרֶץ וְגוֹ' וְאָמַר רַבִּי חַנִּין לְדִידִי חָזִי לִי הַהוּא אַתְרָא וְהַוְיָא חֲמִשָּׁה מִילִין.