Reference for I Chronicles 2:17

וַאֲבִיגַ֕יִל יָלְדָ֖ה אֶת־עֲמָשָׂ֑א וַאֲבִ֣י עֲמָשָׂ֔א יֶ֖תֶר הַיִּשְׁמְעֵאלִֽי׃

And Abigail bore Amasa; and the father of Amasa was Jether the Ishmaelite.