וְלִֽשְׁמַֽעְיָ֤ה בְנוֹ֙ נוֹלַ֣ד בָּנִ֔ים הַמִּמְשָׁלִ֖ים לְבֵ֣ית אֲבִיהֶ֑ם כִּֽי־גִבּ֥וֹרֵי חַ֖יִל הֵֽמָּה׃
Also unto Shemaiah his son were sons born, that ruled over the house of their father; for they were mighty men of valour.
Read midrashic interpretation of I Chronicles 26:6: and classical rabbinic exegesis.