《天工开物·下篇·曲蘖》
观察曲饭的人，在七天之内都要日夜守护在盘架之下，不能熟睡，即便在深更半夜里也要起来好几次。
候视者七日之中，即坐卧盘架之下，眠不敢安，中宵数起。
Those who observe the koji rice must stay under the tray for seven days and nights, unable to fall asleep, and must get up several times even in the middle of the night.