Bhagavata Purana 4.12.17
Srimad Bhagavatam · 12 · Verse 17
Sanskrit Original
तस्यां विशुद्धकरण: शिववार्विगाह्य बद्ध्वासनं जितमरुन्मनसाहृताक्ष: । स्थूले दधार भगवत्प्रतिरूप एतद् ध्यायंस्तदव्यवहितो व्यसृजत्समाधौ ॥ १७ ॥
tasyāṁ viśuddha-karaṇaḥ śiva-vār vigāhya baddhvāsanaṁ jita-marun manasāhṛtākṣaḥ sthūle dadhāra bhagavat-pratirūpa etad dhyāyaṁs tad avyavahito vyasṛjat samādhau
In Badarikāśrama Dhruva Mahārāja’s senses became completely purified because he bathed regularly in the crystal-clear, purified water. He fixed his sitting position and by yogic practice controlled the breathing process and the air of life; in this way his senses were completely withdrawn. Then he concentrated his mind on the arcā-vigraha form of the Lord, which is the exact replica of the Lord and, thus meditating upon Him, entered into complete trance.