Surah Al-A'raf Verse 135

1093 The intercession of Moses was limited to prayer. Each plague or penalty had its appointed term in Allah's decree. That term was duly fulfilled before the plague ceased. Allah's law is firm: it does not vacillate like the human will. The intercession only meant two things: (1) that Allah's name was invoked and His presence duly brought home to the mind and heart of the sinner who promised repentance, and (2) that the sinner was given a further chance if the prayer was accepted. This again is a universal truth.