“Like many people unfamiliar with the history of America's wild, free-roaming horses, I had always thought that the wild horse was a "mustang", that is, a unique breed of horse. In reality, wild horses are feral horses, the offspings of domestic horses that have been turned loose, or escaped, into the wild. By wild, I mean the animals are not owned privately, and they basically fend from themselves without any care or supervision. Moreover, they live in some of America's most remote and sparsely populated high desert country.”

"Wild Horses (The Rolling Stones song)" (co-written with Keith Richards), on Sticky Fingers (1971).
Lyrics
Context: Childhood living is easy to do
The things you wanted, I bought them for you
Graceless lady, you know who I am
You know I can't let you slide through my hands
Wild horses couldn't drag me away
Wild, wild horses, couldn't drag me away.

Source: Jacob's Room

The Natural Horse (1997)

St. 1
The Forsaken Merman (1849)
Context: Come, dear children, let us away;
Down and away below.
Now my brothers call from the bay;
Now the great winds shoreward blow;
Now the salt tides seaward flow;
Now the wild white horses play,
Champ and chafe and toss in the spray.
Children dear, let us away.
This way, this way!

Source: Century Rain (2004), Chapter 15 (p. 242)

Source: Ruby

Source: The United State of Atlantis (2008), p. 127