ころがるいしにはこけはつかない
Composed of
to roll; to tumble; to fall over; to roll over; to lie down; to be scattered about; to be lying around
stone; jewel; precious stone; flint (in a lighter); stone (in go); stone (in the bladder, kidney etc.); calculus
moss; short plants resembling moss (incl. other bryophytes, lichens, very small spermatophytes, etc.)