Srimad-Bhagavatam: Canto 9 - Chapter 1 - Verse 37
Sanskrit:
प्रतिनन्द्य स तां याञ्चां कर्तुमावश्यकं गत: ।निममज्ज बृहद् ध्यायन् कालिन्दीसलिले शुभे ॥ ३७ ॥
ITRANS:
pratinandya sa tāṁ yācñāṁkartum āvaśyakaṁ gataḥnimamajja bṛhad dhyāyankālindī-salile śubhe
Translation:
Durvāsā Muni gladly accepted the request of Mahārāja Ambarīṣa, but to perform the regulative ritualistic ceremonies he went to the river Yamunā. There he dipped into the water of the auspicious Yamunā and meditated upon the impersonal Brahman.