Narasimhapurana 3.25

3.25

tiryaksrotāś ca yaḥ proktas tiryagyoniḥ sa ucyate
tatoūrdhvasrotasāṃ ṣaṣṭho devasargas tu sa smṛtaḥ //

and that which is called the horizontal stream is termed the animal womb; / then that of the upward stream, the sixth, is remembered as the divine creation;