Shiva Purana
अदृष्टाभ्यां तदा ताभ्यां स्वभावान्मुनिसत्तमाः ॥ तावदृष्ट्वा तदा तौ च स्वमातृपितरौ द्विजाः ॥ ६॥
Then the foremost of the sages by their own nature were unseen by them The brāhmaṇas then saw their mother and father.
english translation
adRSTAbhyAM tadA tAbhyAM svabhAvAnmunisattamAH ॥ tAvadRSTvA tadA tau ca svamAtRpitarau dvijAH ॥ 6॥
hk transliteration by Sanscript