Shiva Purana
अग्निरित्यादिभिर्मंत्रैर्जाबालोपनिषद्गतेः । सप्तभिधूलनं कार्यं भस्मना सजलेन च ८ ।
When the ashes are put on the forehead or smeared with water, the seven mantras “Agni॥ 1॥” etc. mentioned in the Jābālopaniṣad, shall be recited.
english translation
agnirityAdibhirmaMtrairjAbAlopaniSadgateH । saptabhidhUlanaM kAryaM bhasmanA sajalena ca 8 ।
hk transliteration by Sanscript