Genesis 35:22-24 Young's Literal Translation (YLT)
22 and it cometh to pass in Israel's dwelling in that land, that Reuben goeth, and lieth with Bilhah his father's concubine; and Israel heareth.
23 And the sons of Jacob are twelve. Sons of Leah: Jacob's first-born Reuben, and Simeon, and Levi, and Judah, and Issachar, and Zebulun.
24 Sons of Rachel: Joseph and Benjamin.