Hymn of purification (vyapohana-stava) - Verse 67

पितरः पितामहाश च तथैव प्रपितामहाः। अग्निष्वात्ता बर्हिषदस तथा मातामहादयः।।

pitaraḥ pitāmahāś ca tathaiva prapitāmahāḥ| agniṣvāttā barhiṣadas tathā mātāmahādayaḥ||