ذَلِكَ أَن لَّمْ يَكُنْ رَّبُّكَ مُهْلِكَ الْقُرَى بِظُلْمٍ وَأَهْلُهَا غَـفِلُونَ

(This is because your Lord would not destroy the (populations of) towns for their wrongdoing while their people were unaware. ) meaning: `We sent the Messengers and revealed the Books to the Jinns and mankind, so that no one has an excuse that he is being punished for his wrongs although he did not receive Allah's Message. Therefore, We did not punish any of the nations, except after sending Messengers to them, so that they have no excuse.' Allah said in other Ayat,

وَإِن مِّنْ أُمَّةٍ إِلاَّ خَلاَ فِيهَا نَذِيرٌ

The third verse (131) tells us that sending prophets and messengers among human beings and the Jinn is based on the dictate of justice and mercy of Allah Ta` ala for He does not send punishment over a people unless they have been awakened through His blessed messengers and provided with the light of guidance.