Surah Ash Shu'ara Tafseer

And when your Lord called Musa:"Go to the people who are wrongdoers. The people of Fir`awn. Will they not have Taqwa!"

He said:"My Lord! Verily, I fear that they will deny me, And my breast straitens, and my tongue expresses not well. So send for Harun. And they have a charge of crime against me, and I fear they will kill me."

So, Musa asked Allah to remove these difficulties for him, as he said in Surah Ta Ha:

قَالَ رَبِّ اشْرَحْ لِى صَدْرِى

وَيَسِّرْ لِى أَمْرِى

Musa said:"O my Lord! Open for me my chest. And ease my task for me." (20:25-26) until:

قَدْ أُوتِيتَ سُوْلَكَ يمُوسَى

You are granted your request, O Musa! (20:36)

وَلَهُمْ عَلَيَّ ذَنبٌ فَأَخَافُ أَن يَقْتُلُونِ

And they have a charge of crime against me, and I fear they will kill me.

because he had killed that Egyptian, which was the reason that he left the land of Egypt