Ezra 8:18-19

181And as the good hand of our God was upon us, they brought us a 2man of insight from the sons of Mahli, the son of Levi, the son of Israel, namely Sherebiah, and his sons and brothers, eighteen men;

19and Hashabiah and 3Jeshaiah of the sons of Merari, with his brothers and their sons, twenty men;