How many days did Allah need to destroy the people of Aad?
The Qur'an speaks in various passages about the people of Aad, and about their destruction by terrible tornado as punishment from Allah for their disobedience.
The Qur'an, however, contradicts itself in the number of days this wind endured.
Therefor We let loose on them a raging wind in evil days, that We might make them taste the torment of disgrace in the life of the world. And verily the doom of the Hereafter will be more shameful, and they will not be helped. [41:16]
And as for A'ad, they were destroyed by a fierce roaring wind, Which He imposed on them for seven long nights and eight long days so that thou mightest have seen men lying overthrown, as they were hollow trunks of palm-trees. [69:6-7]
According to Sura 54:19, the wind continued for a single day, while 41:16 uses the plural form indicating at least three days, and 69:7 specifies exactly eight days