Mudgalapurana 3.32.57.c1

3.32.57.c1

oṃ tatsaditi śrīmadāntye purāṇopaniṣadi śrīmanmaudgale mahāpurāṇe tṛtīye khaṇḍe mahodaracarite dhanakasya vratopadeśo nāma dvātriṃśo'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-second chapter, named "Instruction on the Observance to Dhanaka."