The Supreme Lord induced the son of Dharma to perform three horse sacrifices, and Mahārāja Yudhiṣṭhira, constantly following Kṛṣṇa, the Personality of Godhead, protected and enjoyed the earth, assisted by his younger brothers.
Srimad Bhagavata Purana
श्रीमद्भागवतमहापुराणम्
मूल श्लोकः
अयाजयद्धर्मसुतमश्वमेधैस्त्रिभिर्विभुः । सोऽपि क्ष्मामनुजै रक्षन् रेमे कृष्णमनुव्रतः
ayājayaddharmasutamaśvamedhaistribhirvibhuḥ | so'pi kṣmāmanujai rakṣan reme kṛṣṇamanuvrataḥ
SB 3.3.18