Atharvaveda 9.9.15

9.9.15

stríyaḥ satī́s tā́m u me puṃsáḥ āhuḥ páśyad akṣaṇvā́nn ví cetad andháḥ |
kavír yáḥ putráḥ sá īm ā́ ciketa yás tā́ vijānā́t sá pitúṣ pitā́sat ||15||

Them, being women, they declared (ah) to me to be men; he who hath eyes may see, [but] the blind will not distinguish (vi-cit); the son that is a poet, he verily understood (ā-cit); whoever knows those things apart, he shall be [his] father's father.