The Holy Book of Genesis 13:14:15 "And the LORD said to Abram, after Lot had separated from him: "Lift your eyes now and look from the place where you are--northward, southward, eastward, and westward; 15for all the land which you see I give to you and your descendants forever."
The Holy Book of Genesis 15:18 "On the same day the LORD made a covenant with Abram, saying: "To your descendants I have given this land, from the river of Egypt to the great river, the River Euphrates." This land wasn't actually given to Abraham (see Acts 7:5) and it seems that the closest Abraham's descendents got to this land is stated in the Holy Book of 2 Chronicles 9:26 "He was the ruler over all the kings from the Euphrates River even to the land of the Philistines, and as far as the border of Egypt." which doesn't say he ruled "from the river of Egypt" (Gen 15:18) [Holy Book of 1 Kings 4:21,24 also states what Solomon ruled]. Now if Abraham and his descendents never ruled "from the river of Egypt to the great river, the River Euphrates" (Gen 15:18). How was this fulfilled?