" Hisli's tail flicked to the side as the arrow buried itself in the sand just inches behind her rear hooves. But Ansel didn't dare look over he shoulder. She kept riding, and she did not stop. Celeana lowered her bow and watched until Ansel disappeared beyond the horizon. One arrow, that had been her promise. But she's also promised Ansel that she's had twenty minutes to get out of range.
Celeana had fired after twenty-one. "

― Sarah J. Maas , The Assassin and the Desert (Throne of Glass, #0.3)