One verse

Srimad Bhagavatam 6.9.52

6.9.52

स वा अधिगतो दध्यङ्‌ङश्विभ्यां ब्रह्म निष्कलम् । यद्वा अश्वशिरो नाम तयोरमरतां व्यधात् ॥ ५२ ॥

sa va adhigato dadhyann asvibhyam brahma niskalam yad va asvasiro nama tayor amaratam vyadhat

sah
he
va
certainly
adhigatah
having obtained
dadhyan
Dadhyanca
asvibhyam
to the two Asvini-kumaras
brahma
spiritual knowledge
niskalam
pure
yat va
by which
asvasirah
Asvasira
nama
named
tayoh
of the two
amaratam
liberation in one’s life
vyadhat
awarded.

That saintly Dadhyanca, who is also known as Dadhici, personally assimilated the spiritual science and then delivered it to the Asvini-kumaras. It is said that Dadhyanca gave them mantras through the head of a horse. Therefore the mantras are called Asvasira. After obtaining the mantras of spiritual science from Dadhici, the Asvini-kumaras became jivan-mukta, liberated even in this life.