sa vai bhagavatah saksad
dhanvantarir iti khyata
sah—he; vai—indeed; bhagavatah—of the Supreme Personality of Godhead; saksat—directly; visnoh—of Lord Visnu; amsa-amsa-sambhavah—incarnation of the plenary portion of a plenary portion; dhanvantarih—Dhanvantari; iti—thus; khyatah—celebrated; ayuh-veda-drk—fully conversant in the medical science; ijya-bhak—one of the demigods eligible to share the benefits of sacrifices.
This person was Dhanvantari, a plenary portion of a plenary portion of Lord Visnu. He was very conversant with the science of medicine, and as one of the demigods he was permitted to take a share in sacrifices.
Srila Madhvacarya remarks:
Dhanvantari, who was carrying the jug containing nectar, was a plenary incarnation of the Supreme Personality of Godhead, but although he was very strong, the asuras were able to take the jug of nectar from his hands.
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