In the performance of a sacrifice, there are seven transcendental means to obtain the mercy of the Supreme Personality of Godhead. However, one cannot always obtain the Supreme Lord through this paraphernalia. Nonetheless, the Lord is affectionate to His devotee; therefore when Maharaja Nabhi, who was a devotee, worshiped and offered prayers to the Lord with great faith and devotion and with a pure, uncontaminated mind, superficially performing some yajna in the line of pravargya, the kind Supreme Personality of Godhead, due to His affection for His devotees, appeared before King Nabhi in His unconquerable and captivating form with four hands.

(Srimad-Bhagavatam 5.3.2)