Surah Al Qasas Tafseer

وَلَكِنَّا أَنشَأْنَا قُرُونًا فَتَطَاوَلَ عَلَيْهِمُ الْعُمُرُ

But We created generations, and long were the ages that passed over them.

وَمَا كُنتَ ثَاوِيًا فِي أَهْلِ مَدْيَنَ تَتْلُو عَلَيْهِمْ ايَاتِنَا

And you were not a dweller among the people of Madyan, reciting Our Ayat to them.

meaning, `you were not living among the people of Madyan reciting Our Ayat to them, when you started to tell about Our Prophet Shu`ayb and what he said to his people and how they responded.'

وَلَكِنَّا كُنَّا مُرْسِلِينَ

But it is We Who kept sending.

means, `but We revealed that to you and sent you to mankind as a Messenger.'