So Alexander made preparations for a year...
So Alexander made preparations for a year; and when he was sure that everything was ready, before that he dispatched some of his scouts to explore the route but they came back to report that there were many obstructions on the way. Abdul Malik wrote to Musa bin Nasr that he should appoint someone as his representative and prepare to leave for that place. So Musa made the preparations and set out for that place.
He reached there and after returning from there he wrote to Abdul Malik the conditions prevailing there and wrote that when many days passed and all the provisions were exhausted, we turned to the sea shore which was full of trees and finally reached a wall on which the following verses were inscribed: “Those who possess unlimited power, and they think that they will live in the world forever; they should know that no one will live in the world forever.
If someone had lived forever; who was more powerful than Sulaiman bin Dawood (a.s.)? He should have lived forever. He commanded the jinns to make a building for himself that would last till Judgment Day. So that building was constructed adjacent to those walls and there he buried all the treasures of the world; but they sunk into the ground and no sign remained of his kingdom. It was so because that he may know that except for the kingdom of Allah no ones kingdom will endure forever.
Now when in the progeny of Adnan, from the family of Bani Hashim, a person will be born whom the Almighty Allah will give miracles and send to all the people of the world. He will have the keys of all the world. And then those keys will remain with his successors and they are his twelve caliphs who will come after him and when from those caliphs the one who will rise with the order of Allah ( Qaim bi Amrillah ) his name will be announced from the sky.
When Abdul Malik read this letter and the messenger, Talib bin Mudrik also narrated the eye-witness account, at that time Muhammad bin Shahab Zuhri was seated with Abdul Malik. He asked Zuhri: “What is your opinion about this strange matter?” Zuhri said: “In my view, jinns are guarding that place.” “And what do you think about the call of the sky?” “Chief of believer, its better if you don’t ask about it.” “How can I ignore it? It is a great news.