Surah Hud · سُوْرَةُ هُوْدٍ · Juz 12
Q 11:65
فَعَقَرُوهَا فَقَالَ تَمَتَّعُوا۟ فِى دَارِكُمْ ثَلَـٰثَةَ أَيَّامٍ ۖ ذَٰلِكَ وَعْدٌ غَيْرُ مَكْذُوبٍ
Translations
But they hamstrung her, so he said, "Enjoy yourselves in your homes for three days. That is a promise not to be denied."Ils la tuèrent. Alors, il leur dit: «Jouissez (de vos biens) dans vos demeures pendant trois jours (encore)! Voilà une promesse qui ne sera pas démentie».Tafsir
They denied what he said and harmed her, pushing their denial to extremes. So Ṣāliḥ told them to enjoy life in their land for three days from the time they harmed her, then the punishment of Allah would come to them; and the coming of His punishment after that was a certain promise that there would be no possibility of denying, as it would come true.
Read Ibn Kathir (Ibn Kathir (abridged, English))
"And O my people! This she-camel of Allah is a sign to you, so leave her to graze in Allah's land, and touch her not with evil, lest a near torment should seize you. (64)But they slaughtered her. So he said: "Enjoy yourselves in your homes for three days. This is a promise (a threat) that will not be belied. (65)So when Our commandment came, We saved Salih and those who believed with him by a mercy from Us, and from the disgrace of that Day. Verily, your Lord – He is the All-Strong, the All-Mighty (66)And As-Sayhah (awful cry) overtook the wrongdoers, so they lay (dead), prostrate in their homes (67)As if they had never lived there. No doubt! Verily, Thamud disbelieved in their Lord. So away with Thamud!) A discussion of this story has already preceded in Surat Al-A'raf and it is sufficient without having to be repeated here. Allah is the Giver of succes (68)
Arabic text: Tanzil (Uthmani). Translations: Sahih International (en), Muhammad Hamidullah (fr). tanzil.net