Quran 26:156 — The Poets (Al-Shu`ara')

"Do not touch her with any harm, lest you incur retribution on an awesome day."

[26:155] He said, "Here is a camel that will drink only on a day that is assigned to her; a day that is different from your specified days of drinking.

[26:157] They slaughtered her, and thus incurred sorrow.