SB 4.14.35
rsibhih svasrama-padam
gate putra-kalevaram
sunitha palayam asa
vidya-yogena socati
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
After all the sages returned to their respective hermitages, the mother of King Vena, Sunitha, became very much aggrieved because of her son’s death. She decided to preserve the dead body of her son by the application of certain ingredients and by chanting mantras [mantra-yogena].