Genesis 15:13

“And he said unto Abram, etc.] While he was in a deep sleep; this he said to him in a vision of prophecy: know of a surety, or “in knowing thou shall or mayest know” f1019; and be assured of it, being now told it by the Lord himself, who foreknows all things that ever come to pass; many of which he acquaints his people with beforehand, nor would he hide from Abram his friend what should befall his posterity, as follows: that thy seed shall be a stranger in a land [that is] not theirs; this prophecy could not take place at this time, since Abram had then no seed; but at the birth of Isaac, in whom his seed was called, who sojourned, or was a stranger in Gerar, a part of the land of Canaan, as…”

“- 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…”

“15:13-16 Not even 400 years of bondage could interfere with God’s plan to fulfill the covenant. 15:13 oppressed: The same word is used in Exod 1:11-12. Egypt, like predatory birds (Gen 15:11), would try to destroy Israel and hinder the covenant’s fulfillment. • Apparently 400 years is a round number (also Acts 7:6; cp. Exod 12:40; Gal 3:17). Using the chronology in the Hebrew text, the family moved to Egypt around 1876 BC, and the Exodus occurred around 1446 BC (though many scholars date the Exodus later, around 1270 BC; see Exodus Book Introduction, “The Date of the Exodus”).”