TSK · Deuteronomy 21:17

Everything he owned Abraham left to his son Isaac.

Reuben, you are my firstborn, my might and the beginning of my strength, outstanding in dignity, outstanding in power.

Though Judah was the strongest among his brothers and a leader descended from him, the right of the firstborn belonged to Joseph.)

He struck down all the firstborn in their land, the firstfruits of their reproductive power.