Numbers 31:18

But all the women children, that have not known man by lying with him, keep alive for yourselves.

וְכֹל֙ הַטַּ֣ף בַּנָּשִׁ֔ים אֲשֶׁ֥ר לֹא־יָדְע֖וּ מִשְׁכַּ֣ב זָכָ֑ר הַחֲי֖וּ לָכֶֽם׃