Shiva Purana
निद्रालस्यं महा विघ्नं जित्वा शत्रुं प्रयत्नतः॥ सुखासने स्थितो नित्यं शब्दब्रह्माभ्यसन्निति ॥ ३५॥
Laziness of sleep is a great obstacle to conquering the enemy with great effort Sitting in a comfortable seat, he is always practicing the Brahman of sound.
english translation
nidrAlasyaM mahA vighnaM jitvA zatruM prayatnataH॥ sukhAsane sthito nityaM zabdabrahmAbhyasanniti ॥ 35॥
hk transliteration by Sanscript