וְהַבָּאִ֗ים זָכָ֨ר וּנְקֵבָ֤ה מִכָּל־בָּשָׂר֙ בָּ֔אוּ כַּֽאֲשֶׁ֛ר צִוָּ֥ה אֹת֖וֹ אֱלֹהִ֑ים וַיִּסְגֹּ֥ר יְהוָ֖ה בַּֽעֲדֽוֹ׃
And they that went in, went in male and female of all flesh, as God commanded him; and the LORD shut him in.
Read kabbalistic (mystical) interpretation of Genesis 7:16: and classical mystical sources.