Śrī Śukadeva Gosvāmī continued: My dear King, one day, after finishing his morning duties — evacuating, urinating and bathing — Mahārāja Bharata sat down on the bank of the river Gaṇḍakī for a few minutes and began chanting his mantra, beginning with oṁkāra.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
श्रीशुक उवाच । एकदा तु महानद्यां कृताभिषेकनैयमिकावश्यको ब्रह्माक्षरमभिगृणानो मुहूर्तत्रयमुदकान्त उपविवेश
śrīśuka uvāca | ekadā tu mahānadyāṃ kṛtābhiṣekanaiyamikāvaśyako brahmākṣaramabhigṛṇāno muhūrtatrayamudakānta upaviveśa
SB 5.8.1