Shiva Purana
न शृणोति यदा शृण्वन्योगाभ्यासेन देविके ॥ म्रियतेभ्यसमानस्तु योगी तिष्ठेद्दिवानिशम् ॥ ४२ ॥
O goddess, what others do not hear the Yogin hears by the practice of Yoga. While practising, if he dies, he may stay in that posture for days and nights.
english translation
na zRNoti yadA zRNvanyogAbhyAsena devike ॥ mriyatebhyasamAnastu yogI tiSTheddivAnizam ॥ 42 ॥
hk transliteration by Sanscript