וְהֶחֱזִיקוּ֩ שֶׁ֨בַע נָשִׁ֜ים בְּאִ֣ישׁ אֶחָ֗ד בַּיּ֤וֹם הַהוּא֙ לֵאמֹ֔ר לַחְמֵ֣נוּ נֹאכֵ֔ל וְשִׂמְלָתֵ֖נוּ נִלְבָּ֑שׁ רַ֗ק יִקָּרֵ֤א שִׁמְךָ֙ עָלֵ֔ינוּ אֱסֹ֖ף חֶרְפָּתֵֽנוּ׃ (ס)
And seven women shall take hold of one man in that day, saying: ‘We will eat our own bread, and wear our own apparel; only let us be called by thy name; take thou away our reproach.’
Ibn Ezra on Isaiah
Seven. That is, many; seven is used in this sense because it is the number of the days of the week.1Because the days are only counted to seven, this number is the highest of a series of numbers, and it has often been used to express the idea of a great quantity. All this (that is mentioned in this verse) will happen in consequence of the death of the male persons in battle.
Rashi on Isaiah
Now seven women shall take hold of one man because of the many widows.