Vaishnavakhanda 36.84

Vaiṣṇavakhaṇḍa 36.84

rudrākṣamekaṃ śirasā bibharti
yastathā tripuṃḍraṃ ca lalāṭamadhyake || paṃcākṣarīṃ ye prajapaṃti sādhavaḥ pūjyā bhavadbhiśca na cānyathā kacit