The Rejection of Thamud and Allah's Destruction of Them

Allah informs that Thamud rejected their Messenger because of the injustice and transgression they practiced. This was said by Mujahid, Qatadah and others. Therefore, this resulted in a rejection in their hearts for the guidance and conviction their Messenger came to them with.

إِذِ انبَعَثَ أَشْقَـهَا

قَدْ أَفْلَحَ مَن زَكَّاهَا ﴿9﴾ وَقَدْ خَابَ مَن دَسَّاهَا ﴿10﴾ (success is really attained by him who purifies it, and failure is really suffered by him who pollutes it....91:10). This is the subject of the seven oaths. The primitive meaning of tazkiyah is 'inner cleanliness', signifying 'he who obeyed Allah and purified his inner and outer selves.' Verse [ 10] signifies 'he who caused his soul to sink in the swamp of sins will be deprived'. The word dassa is derived from the basic word dass' which denotes 'to bury in the ground' as for instance it occurs elsewhere in the Qur'an, thus:

أَمْ يَدُسُّهُ فِي التُّرَ‌ابِ