Commentaire sur La Genèse 19:27

אל המקום אשר עמד שם את פני ה, to the place to which he had accompanied the angels. This is where the punishing hand of G’d had first appeared to him. Since he had not been able to save the inhabitants of Sodom legally, he prepared to intercede for them by asking G’d s mercy for them.

וישכם...אל המקום אשר עמד שם, this is similar to 18,22 where we were told that Avraham was still standing in the presence of the Lord. This was the place where the angels had parted from him in his vision. Our sages (Berachot 26) state that Avraham initiated the morning prayer shacharit, as whenever the word עומד is used it refers to the amidah, the principal prayer. David makes reference to this in Psalms 106,30 where he said ויעמוד פנחס ויפלל, that Pinchas stood and prayed, meaning that it behooves man to recite prayers in the morning in which he gratefully acknowledges the daylight in the universe which was provided for him before he set out to go to work. They also add (on folio 6) that it is appropriate for a person to select a specific place where he offers up his prayers on a regular basis.