Genesis 15:18

“In the same day the Lord made a covenant with Abram, etc.] Which he confirmed by passing between the pieces and accepting his sacrifice: saying, unto thy seed have I given this land; he had given it in his purpose, and he had given the promise of it, and here he renews the grant, and ratifies and confirms it, even the land of Canaan, where Abram now was, though only a sojourner in it; and which is described by its boundaries and present occupants, in this and the following verses, as is usually done in grants of lands and deeds of conveyance: from the river of Egypt, unto the great river, the river of Euphrates; the river of Egypt is the Nile, which overflowed it annually and made it…”

“- The Faith of Abram 1. דבר dābār, “a word, a thing;” the word being the sign of the thing. 2. אדני 'ǎdonāy, “Adonai, the Lord;” related: “bring down, lay down.” This is the name usually read in place of Yahweh; but when, as in the present case, יהוה yehovâh and אדני 'ǎdonāy are in apposition, אלהים 'ĕlohı̂ym is read instead of the former. The Jews from a feeling of reverence avoided the utterance of this sacred name except on the most solemn occasions. This is said to have arisen from a stringent interpretation of Leviticus 24:16. According to some, this name was pronounced only once a year by the high priest, on the day of atonement, in the Holy of Holies, and according to others…”

“15:18-19 God specified the boundaries of the Promised Land. His clear message to Abram was that despite prospects of death and suffering (enslavement), he and his descendants would eventually receive the promises, for God had sworn an oath (see Heb 6:13-14). Nothing can separate God’s people from his love or the fulfillment of his plans (see Rom 8:18-39; 2 Pet 1:3-4).”