Mudgalapurana 3.33.32.c1

3.33.32.c1

oṃ tatsaditi śrīmadāntye purāṇopaniṣadi śrīmanmaudgale mahāpurāṇe tṛtīye khaṇḍe mahodaracarite kṛtavīryavrataprāptivarṇanaṃ nāma trayastriṃśo'dhyāyaḥ ||

Om Tat Sat. Thus, in the glorious final Upaniṣad of the Purāṇas, in the glorious Maudgala Mahāpurāṇa, in the third section, in the exploits of Mahodara, the thirty-third chapter, named "Description of the Attainment of the Observance by Kṛtavīrya."