Śrāddha-kalpa: Amarakantaka–Tīrtha-Māhātmya and Akṣaya Pitṛ-Tarpaṇa
ब्रह्मतुण्डह्रदे स्नात्वा सद्दयो भवति ब्राह्मणः / तस्मिंस्तु श्राद्धमानन्त्यं जपहोमतपांसि च
brahmatuṇḍahrade snātvā saddayo bhavati brāhmaṇaḥ / tasmiṃstu śrāddhamānantyaṃ japahomatapāṃsi ca
Having bathed in the Brahmatuṇḍa lake, a brāhmaṇa becomes pure at once. In that tīrtha, śrāddha yields endless merit, and so do japa, homa, and austerities.