अपानॆ जुह्वति प्राणं प्राणॆ अपानं तथा अपरॆ ।
प्राण-अपान गती रुद्ध्वा प्राणायाम परायणाः ॥ ४.२९ ॥
ಅಪಾನೇ ಜುಹ್ವತಿ ಪ್ರಾಣಂ ಪ್ರಾಣೇ ಅಪಾನಂ ತಥಾ ಅಪರೇ |
ಪ್ರಾಣ-ಅಪಾನ ಗತೀ ರುದ್ಧ್ವಾ ಪ್ರಾಣಾಯಾಮ ಪರಾಯಣಾಃ || ೪.೨೯ ||
apAnE juhvati prANaM prANE apAnaM tathA aparE |
prANa-apAna gatI ruddhvA prANAyAma parAyaNAH || 4.29 ||
Some other people, who are devoted to controlling the breath, having checked the courses of prana and apaana, make the prana enter into apaana, and apaana into prana.
(This describes the state of kumbhaka when those practising Yoga suspend the process of respiration completely for some time for the purpose of securing perfect concentration.)