1 Chr 24:4

וַיִּמָּצְא֣וּ בְֽנֵי־אֶלְעָזָ֡ר רַבִּ֞ים לְרָאשֵׁ֧י הַגְּבָרִ֛ים מִן־בְּנֵ֥י אִיתָמָ֖ר וַֽיַּחְלְק֑וּם לִבְנֵ֨י אֶלְעָזָ֜ר רָאשִׁ֤ים לְבֵית־אָבוֹת֙ שִׁשָּׁ֣ה עָשָׂ֔ר וְלִבְנֵ֧י אִיתָמָ֛ר לְבֵ֥ית אֲבוֹתָ֖ם שְׁמוֹנָֽה׃

Since more leaders were found among Eleazar’s descendants than those of Ithamar, they were divided accordingly. There were sixteen heads of families from the descendants of Eleazar and eight from the descendants of Ithamar.