Belarius: “... Weariness
Can snore upon the flint, when resty sloth
Finds the down pillow hard.”
(Cymbeline, Act III, Sc. 6.)
First Priest: “... For charitable prayers,
Shards, flints and pebbles should be thrown on her.”
(Hamlet, Act V, Sc. 1.)
Bastard: “Till their soul-fearing clamours have brawled down
The flinty ribs of this contemptuous city.”
(King John, Act II, Sc. 2.)