וַיִּפְנ֤וּ מִשָּׁם֙ הָֽאֲנָשִׁ֔ים וַיֵּלְכ֖וּ סְדֹ֑מָה וְאַ֨בְרָהָ֔ם עוֹדֶ֥נּוּ עֹמֵ֖ד לִפְנֵ֥י יְהוָֽה׃
Da gingen die Männer von dort weg und schlugen die Richtung nach Sodom ein, Abraham aber blieb vor dem Ewigen stehen.
Rashi on Genesis
ויפנו משם AND [THE MEN] TURNED FROM THENCE —from the place where Abraham had accompanied them.
Sforno on Genesis
Avraham was still standing. Even after the angels arrived in Sedom he did not give up but remained standing in prayer and supplication.
Radak on Genesis
ויפנו משם, this is how it appeared to Avraham in his prophetic vision, i.e. that he had accompanied the angels some distance and after the appropriate distance, the angels turned in a different direction and went away. The angel who had brought the message to Sarah disappeared, whereas the other two proceeded in the direction of Sodom.