Kommentar zu Divrej Hajamim I 2:16
ואחיתיהם [וְאַחְיוֹתֵיהֶ֖ם] צְרוּיָ֣ה וַאֲבִיגָ֑יִל וּבְנֵ֣י צְרוּיָ֗ה אַבְשַׁ֛י וְיוֹאָ֥ב וַעֲשָׂה־אֵ֖ל שְׁלֹשָֽׁה׃
Und ihre Schwestern waren Zeruja und Abigail. Und die Söhne Zeruias: Abischai und Joab und Asahel, drei.
Rashi on I Chronicles
And their sisters: Zeruiah and Abigail [They are mentioned] because of David’s honor, i.e., they [Joab, Abishai, and Asael] were his sister’s sons, mighty men and princes. So it is explained further.
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