Numbers 26:8

5 Reuben, the firstborn of Israel; the sons of Reuben: [of] Hanoch, the family of the Hanochites; of Pallu, the family of the Palluites;

6 of Hezron, the family of the Hezronites; of Carmi, the family of the Carmites.

7 These are the families of the Reubenites; and those who were numbered of them were forty-three thousand seven hundred thirty.

9 The sons of Eliab: Nemuel, and Dathan, and Abiram. These are that Dathan and Abiram, who were called of the congregation, who strove against Moses and against Aaron in the company of Korah, when they strove against Yahweh,

10 and the earth opened its mouth, and swallowed them up together with Korah, when that company died; what time the fire devoured two hundred fifty men, and they became a sign.

11 Notwithstanding, the sons of Korah didn`t die.