'Sons of Levi' in the Bible

These were the sons of Levi by their names: Gershon, and Kohath, and Merari.

"Take a census of the sons of Kohath from among the sons of Levi, by their families, by their fathers' houses,

and put fire in them, and put incense on them before the LORD tomorrow: and it shall be that the man whom the LORD chooses, he shall be holy. You have gone too far, you sons of Levi."

Moses said to Korah, "Hear now, you sons of Levi.

and that he has brought you near, and all your brothers the sons of Levi with you? and do you seek the priesthood also?