What is the meaning of the throwing of Satan into the wish of the prophet?

Question 42: The Almighty said, {And We did not send before you any messenger or prophet except that when he wished, Satan threw into it . But Allah abrogates that which Satan throws in; then Allah makes His verses explicit. And Allah is Knowing and Wise. * so He may make what Satan throws a trial for those within whose hearts is disease and those hard of heart. And indeed, the unjust are in extreme dissension.} [Quran 22:52-53]. What is the meaning of the throwing of Satan into the wish of the prophet?