Daksh-Prajapati passed this knowledge to twins having faces identical to that of HORSE –ASHWINI-KUMAAR who are known as physician/doctor of gods.  It is said that Ashwini-Kumar cured dislocation of shoulder joint of lord Indra.

They gained this knowledge from Daksh Prajapati & forwarded it to lord INDRA

Lord Indra passed it in 2 legacies namely- AATREYA PARAMPARAA & DHANVANTRI PARAMPARA.