Charles Ellicott Commentary Genesis 28:16

"And Jacob awaked out of his sleep, and he said, Surely Jehovah is in this place. And I knew it not." — Genesis 28:16 (ASV)

Surely the Lord (Jehovah) is in this place. — Jacob was not unaware of the omnipresence of the Deity: what astonished him was that Jehovah should thus reveal Himself far away from the shrines where He was worshipped. Rebekah had gone to one of these to inquire of Jehovah (Genesis 25:22), and probably to a shrine in the very neighbourhood of the place where Jacob was sleeping (Genesis 12:8).

But first Abraham, and then Isaac, had for so long made Beer-sheba their home, that Jacob probably knew little about the sanctity of the spot, and felt himself far away from all the religious associations of his youth, and from that “presence of Jehovah” which in antediluvian times had also been supposed to be confined to certain localities (Genesis 4:16). But one great object of the dream was to show that Jehovah watches over the whole earth, and that messengers to and fro come from Him and return to Him.