Did William Shakespeare say “A horse! a horse! my kingdom for a horse”?

Did William Shakespeare say “A horse! a horse! my kingdom for a horse”?

Found word for word. Yes. The text appears in works attributed to William Shakespeare. Source and location below.

KING RICHARD. A horse! a horse! my kingdom for a horse! CATESBY. Withdraw, my lord! I'll help you to a horse. KING RICHARD. Slave, I have set my life upon a cast And I Will stand the hazard of the die. I think there be six Richmonds in the field; Five have I slain to-day instead of him. A horse! a horse! my kingdom for a horse! Exeunt
The Complete Works of William Shakespeare — William Shakespeare, SCENE 4. · ¶4508 · Public domain (US), Project Gutenberg #100 · source

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