Numbers 26:13

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

Notwithstanding, the sons of Korah didn’t die.

The sons of Simeon after their families: of Nemuel, the family of the Nemuelites; of Jamin, the family of the Jaminites; of Jachin, the family of the Jachinites;

These are the families of the Simeonites, twenty-two thousand two hundred.

The sons of Gad after their families: of Zephon, the family of the Zephonites; of Haggi, the family of the Haggites; of Shuni, the family of the Shunites;

of Ozni, the family of the Oznites; of Eri, the family of the Erites;