Mentioning the Story of Musa and that it is a Lesson for Those Who fear Allah

Allah informs His Messenger Muhammad about His Messenger Musa. He mentions that he sent Musa to Fir`awn and He aided him with miracles. Yet, even after this, Fir`awn continued in his disbelief and transgression until Allah seized him with a mighty and powerful punishment. Thus is the punishment of whoever opposes you (Muhammad) and rejects that which you have been sent with. This is why Allah says at the end of the story, إِنَّ فِى ذَلِكَ لَعِبْرَةً لِّمَن يَخْشَى In this is a Lesson for whoever fears.

Allah begins by saying,

هَلْ أتَاكَ حَدِيثُ مُوسَى ﴿١٥﴾

Has there come to you the story of Musa?

meaning, have you heard of his story