Genesis 27:39
And Isaac his father answered and said unto him, Behold, thy dwelling shall be the fatness of the earth, and of the dew of heaven from above;
Cross-reference
Genesis 27:28 gave Jacob heaven's dew and earth's richness — exactly what Esau is denied here. The two blessings form a stark reversal.
Genesis 36:6-8 shows this blessing fulfilled: Esau moves to Seir, separated from Jacob, dwelling away from the richer land of Canaan.
In Genesis 33:9, Esau says 'I already have plenty' — a striking contrast to his blessing of scarcity, suggesting God provided beyond the prediction.
Genesis 49:26 describes blessings surpassing the mountains and ancient hills — the abundant inheritance Jacob's line receives, contrasting Esau's barren destiny.
In Joshua 24:4, God confirms He gave Esau the hill country of Seir — the sparse terrain fitting this blessing of dwelling away from earth's richness.
Hebrews 11:20 directly references Isaac blessing both sons regarding their future — Esau's blessing here is one of those spoken by faith.