Shiva Purana
मन्त्रन्यासादिकं कृत्वा सफलीकृतविग्रहः ॥ आवयोर्विग्रहौ ध्यायन्प्राणापानौ नियम्य च ॥ २२ ॥
After chanting mantras and other rituals he made the battle successful He meditated on the conflict between the two of us and controlled his breathing and expiration.
english translation
mantranyAsAdikaM kRtvA saphalIkRtavigrahaH ॥ Avayorvigrahau dhyAyanprANApAnau niyamya ca ॥ 22 ॥
hk transliteration by Sanscript