One verse

Srimad Bhagavatam 4.31.3

4.31.3

तान्निर्जितप्राणमनोवचोद‍ृशो जितासनान् शान्तसमानविग्रहान् । परेऽमले ब्रह्मणि योजितात्मन: सुरासुरेड्यो दद‍ृशे स्म नारद: ॥ ३ ॥

tan nirjita-prana-mano-vaco-drso jitasanan santa-samana-vigrahan pare ’male brahmani yojitatmanah surasuredyo dadrse sma naradah

tan
all of them
nirjita
completely controlled
prana
the life air (by the pranayama process)
manah
mind
vacah
words
drsah
and vision
jita-asanan
who conquered the yogic asana, or sitting posture
santa
pacified
samana
straight
vigrahan
whose bodies
pare
transcendental
amale
free from all material contamination
brahmani
in the Supreme
yojita
engaged
atmanah
whose minds
sura-asura-idyah
worshiped by the demons and by the demigods
dadrse
saw
sma
in the past
naradah
the great sage Narada

After practicing the yogasana for mystic yoga, the Pracetas managed to control their life air, mind, words and external vision. Thus by the pranayama process they were completely relieved of material attachment. By remaining perpendicular, they could concentrate their minds on the uppermost Brahman. While they were practicing this pranayama, the great sage Narada, who is worshiped both by demons and by demigods, came to see them.