Patanjali Yog Sutra
बाह्याभ्यन्तरविषयाक्षेपी चतुर्थः ॥२-५१॥
That Pranayama which goes beyond the sphere of internal and external is the fourth (variety).
english translation
श्वास को बाहर रोकने व अन्दर रोकने के कार्य का विरोध करने वाला यह चौथा प्राणायाम है
hindi translation
bAhyAbhyantaraviSayAkSepI caturthaH ॥2-51॥
hk transliteration by Sanscript