גַּ֣ם מֵע֧וֹף הַשָּׁמַ֛יִם שִׁבְעָ֥ה שִׁבְעָ֖ה זָכָ֣ר וּנְקֵבָ֑ה לְחַיּ֥וֹת זֶ֖רַע עַל־פְּנֵ֥י כָל־הָאָֽרֶץ׃
אױך פֿון די פױגלען פֿון הימל צו זיבן און זיבן, אַן ער און אַ זי, כּדי צו דערהאַלטן זאָמען אױפֿן געזיכט פֿון דער גאַנצער ערד.
Zohar
Thus the words “these are the generations” imply that this brought forth products and no other. So it was with Noah in the lower world. Noah was the sacred covenant below corresponding to that above, and hence is called “Man of the earth”. The inner meaning which we learn from this is that Noah had need of an ark with which to become united in order thereby to preserve the seed of all species, as it is written, “To preserve seed”.