摩訶止觀 4.157

4.157

若睡蓋多者，當勤精進策勵身心，加意防擬思惟法相，分別選擇善惡之法，勿令睡蓋得入。又當選擇善惡之心，令生法喜；心既明淨，睡蓋自除。莫以睡眠因緣失二世樂，徒生徒死，無一可獲。如入寶山，空手而歸，深可傷歎！當好制心，善巧防御也。杖、毱、貝、申脚、起星、水洗。

If the hindrance of sleep is abundant, one should be diligent and energetic, spurring on body and mind, paying extra attention to guard against it, reflecting on the characteristics of dharmas, distinguishing and selecting between wholesome and unwholesome dharmas, not letting the hindrance of sleep enter. Moreover, one should select wholesome and unwholesome states of mind, giving rise to Dharma-joy; once the mind is bright and pure, the hindrance of sleep will naturally be eliminated. Do not, because of sleep, lose the joy of two lifetimes, living and dying in vain without obtaining a single thing. It is like entering a jewel mountain and returning empty-handed, deeply lamentable! One must properly control the mind and skillfully defend against it. [Using expedients such as] the stick, ball, cowrie shell, stretching the legs, looking up at the stars, and washing with water.