I will instruct thee and teach thee in the way which thou shalt go: I will
guide thee with mine eye. Be ye not as the horse, or as the
mule, which have no understanding: whose mouth must be
held in with bit and bridle, lest they come near unto
thee. Bible (Old Testament) Psalms 32:8^9.
It seems to me a barren thing this Conservatisman unhappy
cross-breed, the mule of politics that engenders nothing. Benjamin, 1st Earl of Beaconsfield Disraeli Coningsby, bk.3, ch.5.
What that Sicilian mule was to me, I have been to the Queen. W(illiam) E(wart) Gladstone Memorandum on his relationship with Queen Victoria,
You got to have smelt a lot of mule manure before you can sing like a
hillbilly. (Hiram) Hank Williams Quoted in Rolling