Thou shalt not muzzle the ox when he treadeth out the corn.

-Bible (Old Testament)
Deuteronomy 25:4.

I put the muzzle of the revolver into my right ear and pulled the trigger† I was out by one. I remember an extraordinary sense of jubilation, as if carnival lights had been switched on in a drab street. My heart knocked in its cage, and life contained an infinite number of possibilities.

-Greene, (Henry) Graham
Recalling a game of Russian roulette with his brother's revolver in1923.  A Sort of Life, ch.6, pt.2.