Śrāddha-kalpa: Amarakantaka–Tīrtha-Māhātmya and Akṣaya Pitṛ-Tarpaṇa
धूतपापस्थलं प्राप्य पूतः स्नात्वा भवेन्नरः / रुद्रस्तत्र तपस्तेपे देवदेवो महेश्वरः
dhūtapāpasthalaṃ prāpya pūtaḥ snātvā bhavennaraḥ / rudrastatra tapastepe devadevo maheśvaraḥ
Reaching the place called Dhūtapāpa and bathing there, a man becomes purified. There Rudra—Mahēśvara, god of gods—performed austerities.