וַאֲחוֹתֵ֨ךְ הַגְּדוֹלָ֤ה שֹֽׁמְרוֹן֙ הִ֣יא וּבְנוֹתֶ֔יהָ הַיּוֹשֶׁ֖בֶת עַל־שְׂמֹאולֵ֑ךְ וַאֲחוֹתֵ֞ךְ הַקְּטַנָּ֣ה מִמֵּ֗ךְ הַיּוֹשֶׁ֙בֶת֙ מִֽימִינֵ֔ךְ סְדֹ֖ם וּבְנוֹתֶֽיהָ׃
你的姐姐是撒馬利亞，她和她的眾女兒住在你的左邊；你的妹妹是所多瑪，她和她的眾女兒住在你的右邊。
Rashi
“Your left side” symbolizes Samaria; “your right side” symbolizes Judah, because Judah is in the south of the land of Israel, as it is said (16:46): “And your big sister Samaria...who lives at your left.” Also in the Book of Joshua (15:1), he describes the border of the tribe of Judah as occupying the entire southern border.
Sforno
אם אמצא בסדום, now that I will examine them individually, having sent My angels, if I find 50 righteous men of the type that will protest and try to stop the wickedness of the remainder of the people in Sodom, the leading city of the valley, (compare Ezekiel 15,46)