Deuteronomy 21:17
Instead, he must acknowledge the firstborn of the unloved wife by giving him double of everything he owns, because he is really the first fruit of his father's strength. The right of the firstborn belongs to him."
Genesis 49:3
"Reuben, you're my firstborn, my strength, and the first fruit of my vitality. You excel in rank and excel in power.
Genesis 25:31-34
But Jacob responded, "Sell me your birthright. Do it now."
Genesis 25:5-6
Abraham gave everything he owned to Isaac.
1 Chronicles 5:1-2
Here is a record of the descendants of Reuben, Israel's firstborn. (He was the firstborn, but because he defiled his father's marriage bed, his birthright was transferred to the descendants of Israel's son Joseph. As a result, Reuben is not enrolled in the genealogy according to the birthright.
Psalm 105:36
He struck down every firstborn in their land, the first fruits of all their progeny.