Here comes the lady! O, so light a foot

Will ne'er wear out the everlasting flint.

William Shakespeare (1564-1616): Romeo and Juliet. Act ii. Sc. 6.

Weariness

Can snore upon the flint, when resty sloth

Finds the down pillow hard.

William Shakespeare (1564-1616): Cymbeline. Act iii. Sc. 6.