kasyasya kasis tat-putro
Translation by His Divine Grace A. C. Bhaktivedanta Swami Srila Prabhupada:
The son of Kasya was Kasi, and his son was Rastra, the father of Dirghatama. Dirghatama had a son named Dhanvantari, who was the inaugurator of the medical science and an incarnation of Lord Vasudeva, the enjoyer of the results of sacrifices. One who remembers the name of Dhanvantari can be released from all disease.