Maitrayaniya Upanishad 1.p3

Maitryupaniṣaddīpikā (Rāmatīrtha) 1.p3

praṇamya rāmaṃ praṇatābhayapradaṃ gurūstathā kṛṣṇamukhāṃstadātmanaḥ | maitrāyaṇānāṃ śrutimaulimarthataḥ prasādhya viṣṇoḥ parame pade'rpaye |