The Conversation between Salih and the People of Thamud
Allah, the Exalted, mentions what transpired in the discussion between Salih and his people. Allah informs of their ignorance and obstinacy in their statement,
قَدْ كُنتَ فِينَا مَرْجُوًّا قَبْلَ هَـذَا
(You have been among us as a figure of good hope till this!) They were saying in this, "We had hope in your strong intellect before you began saying what you have said."
(He said: "O my people! Tell me, if I have a clear proof from my Lord...") `In reference to what He (Allah) has sent me with to you, I am upon conviction and sure evidence.'
(and there has come to me a mercy from Him, who then can help me against Allah, if I were to disobey Him) `and abandon calling you to the truth and the worship of Allah alone. If I did so, you would not be able to bring me any benefit, nor increase me
غَيْرَ تَخْسِيرٍ
(but in loss.)' This means loss and ruin.
Ma'arif al-Qur'an
Mufti Muhammad ShafiOn ayahs 67–68
According to Tafsir al-Qurtubi, these three days were Thursday, Friday and Saturday. On Sunday, the punishment descended upon them: وَأَخَذَ الَّذِينَ ظَلَمُوا الصَّيْحَةُ (And those who transgressed were caught by the Cry - 67). This awesome Cry was that of the archangel, Sayyidna Jibra'il (علیہ السلام) which was far more terrorizing that the combined thunderbolts of worldly lightening could ever be, something human senses could not take. All hearts were rent apart by the horrific sound resulting in the mass destruction of those people.
From this verse we learn that the people of Sayyidna Salih (علیہ السلام) were destroyed by a severe Sound, but what Surah al-A` raf says about them is: فَأَخَذَتْهُمُ الرَّجْفَةُ (So, the earthquake seized them - 7:78, 91) which, as obvious, tells us that the punishment visiting them was that of the earthquake. Commentator al-Qurtubi has said that there is no contradiction here. It is possible that the earthquake came first and then they all were destroyed by the severe Sound. Allah knows best.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 63–67
The Prophet Salih the successor of Ad called upon his community to worship the one and only God. Indeed, this had been the aim of all the prophets in every age. But, Salih’s community did not accept his message. The reason for this was that he was talking of linking them directly to God, while they held that they were linked to their great and holy men in the name of God. Now, since Salih’s sole strength was the power of reasoning, his community was not impressed by the significance of what he had to say. The importance of the religion which Salih was urging them towards would have been clear if they had given due consideration to God’s revelation and signs. But the members of his community were willing to give due recognition only to that religion which had come down to them through the records and traditions of the leading lights of their community. The result was that the community, in spite of being overwhelmed by his arguments, were in a dilemma of doubt. Like all other prophets, as Salih grew up in his community he was recognised as one who was distinctive in personality and intelligence. It was hoped that, on growing up, he would prove to be a useful member of society. But, things took a different turn and he started criticising the religion prevalent at that time. Seeing this, his people were greatly disappointed in him. They said, ‘We were under the impression that you would be a pillar of our established religious system. On the contrary, we see that you are bent upon proving our religious system baseless.’ In every period God’s true missionaries had to face this sort of reaction on the part of their communities.