Ezra 8:18-19

18And as the good hand of our God was upon us, they brought us a man of understanding (insight) from the sons of Mahli, the son of Levi, the son of Israel, named Sherebiah, with his sons and his brothers (relatives), 18 men;

19and Hashabiah, and with him Jeshaiah of the sons of Merari, with his brothers (relatives) and their sons, 20 men;