Commentary
It has appeared in previous verses that the Du` a' of Sayyidna Salih (علیہ السلام) had made a big rock open up in the nearby mountain through which an extraordinary she-camel had come out. Then, Allah Ta` ala had made this she-camel the last trial for these people as she drank up all water from the well which was used by the people and animals of the locality for their needs. Therefore, Sayyidna Salih (علیہ السلام) had fixed turns, a day for the she-camel and another for the people of the area.
The people of Thamud were in trouble because of this she-camel. They wished she would somehow die. But, they did not dare do it themselves lest they are hit by some Divine punishment.
But, Satan has an unlimited array of weapons. One of his deadliest strategies of deception which makes human beings surrender whatever sense and sensibility they have is the trial through women. So, two beautiful damsels from the people of Thamud threw a wager: Whoever kills this she-camel could take us, or anyone from among our girls to become his own.
Two young men from Thamud, called Misda` and Qadhar, all drunk with the rosy prospect, went out to kill the she-camel. They hid themselves behind a big rock and waited for the she-camel to pass by them on its usual route. When the she-camel appeared before them, Misda` hit her with an arrow and Qadhar hamstrung her by cutting her legs with his sword. Thus, they killed the she-camel.
The Holy Qur'an calls this person the most cruel and wretched from among the people of Thamud: إِذِ انبَعَثَ أَشْقَاهَا ﴿12﴾ when the one, most wicked of them, was sent [ incited to kill her ] - 91:12) because that was what brought mass punishment on the people of Thamud.
Sayyidna Salih (علیہ السلام) ، after having found that the she-camel has been killed, told his people - as Divinely commanded - that they have only three days to live: تَمَتَّعُوا فِي دَارِكُمْ ثَلَاثَةَ أَيَّامٍ ۖ ذَٰلِكَ وَعْدٌ غَيْرُ مَكْذُوبٍ that is, ` enjoy yourselves in your homes for three days (only) [ after that the punishment is coming ]. That is a promise, not going to be false - 11:65.' But, when the undoing of a people becomes due, no advice or warning works. This is what happened with these wretched people. Even the very honest counsel of Sayyidna Salih (علیہ السلام) did not produce the desired effect. In turn, they started making fun of him by challenging him as to how and from where would this punishment come and what would be the signs of its coming.
Sayyidna Salih (علیہ السلام) said: ` You want signs, so hear this. Tomorrow, on Thursday, your faces will turn dark yellow. Men, women, the young and the old, no one will remain exempted. Then, day after tomorrow, on Friday, all faces will turn dark red; and on Saturday, the third day to come, all faces will turn jet black. And this day will be the last day of your life.' Despite having heard what was said, these wretched people, rather than repent and seek forgiveness, decided that they better kill Sayyidna Salih (علیہ السلام) himself. Their ` logic' was: If he is true and the punishment has to come upon them, why should they not finish him first before the punishment comes to finish them - …