Yoga Sūtra Chapter Three verse 40
समानजयाज्ज्वलनम् ॥४०॥
samāna-jayāt jvalanam ||40||
From mastery of the middle breath, glow.
samāna - digestive air, middle breath; alike, similar, equaljaya - mastery; conquest, victory, triumph, winningjvalana - glow
