murlikrsna

It is in Garga Samhita. Prayed by a devotee who was cursed to become a conch becouse he has stolen the conch which belongs to his Guru. By the instruction of his Guru He in the form of conch waited for Lord Krsna for 100years near a lake. As soon as he had the darshan of Lord Srikrsna he received his original form and then he prayed with many verses "twamava mata" is one of them. This place is known as Sankha Tirtha near Dwarika.