SB 9.22.37
kalaseyam purodhaya
turam turaga-medhasat
samantat prthivim sarvam
jitva yaksyati cadhvaraih
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
After conquering throughout the world and after accepting Tura, the son of Kalasa, as his priest, Janamejaya will perform asvamedha-yajñas, for which he will be known as Turaga-medhasat.