Yoga Sūtra Chapter Three verse 42

kāya-ākāśayoḥ saṃbandha-saṃyamāt-laghu-tūla-samāpatteḥ ca-ākāśa-gamanam ||42||

From complete restraint of relationship of body and space
and unity with lightness and cotton,
travel through space.

kāya - the bodyākāśa - space; ether; subtle and ethereal fluid; sky, atmospheresaṃbandha - connectionsaṃyama - complete restraintlaghu - lightnesstūla - cottonsamāpatti - coming together, unityca - andgamana - travel