いしにまくらしながれにくちすすぐ

石に枕し流れに漱ぐ

to live freely in the wilderness; to sleep on a pillow of stone and rinse one's mouth with river water

N3Expression
Expression, Godan verb (gu ending)
to live freely in the wildernessto sleep on a pillow of stone and rinse one's mouth with river water