וּבְנֵ֨י קְטוּרָ֜ה פִּילֶ֣גֶשׁ אַבְרָהָ֗ם יָלְדָ֞ה אֶת־זִמְרָ֧ן וְיָקְשָׁ֛ן וּמְדָ֥ן וּמִדְיָ֖ן וְיִשְׁבָּ֣ק וְשׁ֑וּחַ וּבְנֵ֥י יָקְשָׁ֖ן שְׁבָ֥א וּדְדָֽן׃ (ס)
Und die Söhne Keturas, Abraham's Konkubine: Sie gebar Zimran und Jokshan und Medan und Midian und Ishbak und Shuah. Und die Söhne Jokshans: Saba und Dedan.
Rashi
And the sons of Keturah, Abraham’s concubine Anything disgraceful that he could tell about them he tells to enhance Isaac’s honor, i.e., they were all the children of a concubine, but he was the mainstay and the master of the household.