Genesis 12:14
14 And it came to pass, that, when Abram was come into Egypt, the Egyptians beheld the woman that she was very fair.
Gen. 12:14. "For ever." Such a phrase sometimes signifies no longer than "till the year of jubilee;" so Exodus 21:6. But if this phrase is limited by the year of jubilee, which came at the end of every fifty years, no wonder that it should be spoken of as what should be continued forever, which was to last to the end of the ages of that dispensation, till the coming of Christ, and the introduction of the glorious gospel-day, the great thing typified by the jubilee. There were some ordinances which were only for one particular time; so were several in the 12th chapter of Exodus, such as eating the paschal lamb with their staff in their hand, etc., and their sprinkling the blood on the door-posts. Many ordinances were only occasional precepts to be observed on the occasion of God's appearance at Mount Sinai, and the occasion of building the tabernacle, the occasion of setting apart the tribe of Levi and the family of Aaron, consecrating the tabernacle, altar, etc. The occasion of the destruction of Korah and his company; the occasion of their being plagued with fiery serpents; the occasion of their passing through Jordan; the occasion of the siege of Jericho, etc. Some ordinances were in force only during their continuing in the wilderness, as the ordinances concerning their encampments and marches, their gathering and disposing of the manna, their bringing all the beasts they killed to eat to the door of the tabernacle, etc. It is in contradistinction to these that the ordinances that were to be continued throughout the ages of their dispensation and of the Jewish state in Canaan, are called perpetual or everlasting statutes; and in this view, and as compared with those transitory and temporary statutes, they might well be so called.
Gen. 13:10