When I bestride him, I soar, I am a hawk: he trots the air; the earth sings when he touches it; the basest horn of his hoof is more musical than the pipe of Hermes.
Henry V

A horse! a horse! my kingdom for a horse!
King Richard III (5.4.10-17)

He's of the colour of the nutmeg. And of the heat of the ginger.... he is pure air and fire; and the dull elements of earth and water never appear in him, but only in patient stillness while his rider mounts him; he is indeed a horse, and all other jades you may call beasts. ~William Shakespeare, Henry V

He doth nothing but talk of his horse.
"The Merchant of Venice" (1.2.10)

Look, when a painter would surpass the life,
In limning out a well-proportion’d steed,
His art with nature’s workmanship at strife,
As if the dead the living should exceed;
So did this horse excel a common one,
In shape, in courage, colour, pace and bone.

Round-hoof’d, short-jointed, fetlocks shag and long,
Broad breast, full eye, small head, and nostril wide,
High crest, short ears, straight legs and passing strong,
Thin mane, thick tail, broad buttock, tender hide:
Look, what a horse should have he did not lack,
Save a proud rider on so proud a back.

Venus and Adonis (289-301)

O! for a horse with wings! ~William Shakespeare, Cymbeline

The strong-neck’d steed, being tied unto a tree,
Breaketh his rein, and to her straight goes he.
Imperiously he leaps, he neighs, he bounds,
And now his woven girths he breaks asunder;
The bearing earth with his hard hoof he wounds,
Whose hollow womb resounds like heaven’s thunder;
The iron bit he crushes ’tween his teeth,
Controlling what he was controlled with.
Venus and Adonis (274-81)