humicubation
The act or practice of lying on the ground.
countable, obsolete, uncountable
He is afraid, that this Doctrine of fasting, and mourning, and tears, and humicubation, and sackcloth, and ashes, pertaineth to the establishment of Romish pennance.
Where it comes from
From Latin humus (“the ground”) + cubare (“to lie down”).
Adapted from the Wiktionary entry humicubation (CC BY-SA 4.0).