17 but he shall acknowledge the firstborn, the son of the hated, by giving him a double portion of all that he has; for he is the beginning of his strength. The right of the firstborn is his.
Deuteronomy 21:17 Cross References - WEB
Genesis 25:5-6
Genesis 25:31-34
31 Jacob said, “First, sell me your birthright.”
32 Esau said, “Behold, I am about to die. What good is the birthright to me?”
33 Jacob said, “Swear to me first.” He swore to him. He sold his birthright to Jacob.
34 Jacob gave Esau bread and lentil stew. He ate and drank, rose up, and went his way. So Esau despised his birthright.
Genesis 49:3
3 “Reuben, you are my firstborn, my might, and the beginning of my strength; excelling in dignity, and excelling in power.
1 Chronicles 5:1-2
1 The sons of Reuben the firstborn of Israel (for he was the firstborn; but, because he defiled his father’s couch, his birthright was given to the sons of Joseph the son of Israel; and the genealogy is not to be listed according to the birthright.
2 For Judah prevailed above his brothers, and from him came the prince; but the birthright was Joseph’s)—
Psalms 105:36
36 He struck also all the firstborn in their land, the first fruits of all their manhood.