בֶּן־אָדָ֑ם שְׁתַּ֣יִם נָשִׁ֔ים בְּנ֥וֹת אֵם־אַחַ֖ת הָיֽוּ׃
’Son of man, there were two women, the daughters of one mother;
Rashi on Ezekiel
the daughters of one mother The two of them were from one nation, separated into two in the days of Rehoboam.