What does Numbers 26:9 mean?

Eliab’s sons were Nemuel, Dathan, and Abiram. Dathan and Abiram were the ones who joined Korah’s rebellion against Moses and Aaron, and who challenged the Lord’s authority. Numbers 26:9 - Modern Text Bible

(This verse reminds us that Dathan and Abiram, from this family, were leaders in a past rebellion against Moses and God.)