و بقيتُ سَنتين لم أضع جَنبِي إلى الأرض

I spent two years of my life without ever lying down on my side.

—Imām Nawawī [d. 676H/1278CE] describing his period of intense study in Damascus, where he would read and study through the days and nights

[related by Ibn Daqīq al-‘Īd in his commentary to the Arba‘īn]