The Study of the Verses Surmising the Commitment of Sin or Abandoning the Better Action by Prophet Moses in the Murder of a Coptic Man

In the fighting between a Pharaonic and an Israelite, Prophet Moses helped the Israelite, and his pushing away the Pharaonic (Coptic) led to his death. The question that arises in this regard is whether the statements quoted from prophet Moses after killing the Coptic be reconciled with his infallibility? The verses that raise the doubt of sin or abandoning the better action.
are: «هذا من عمل الشیطان»؛ «قال رب إنی ظلمت نفسی‏ فاغفرلی»؛ «قال فعلتها إذا وانا من الضالین»
Studies show that all Shiite commentators have regarded this murder as Tark-e- ula (abandoning the better action), and all Sunni commentators (except Fakhr Razi) have considered it a sin. Using the descriptive - analytical method, this paper has dealt with this doubt and concluded that the murder of Coptic by the Prophet was neither a sin; nor abandoning the better action. The pronoun "Hadha" in the first verse refers to the fight between Sebti and Coptic. The word "oppression" and "forgiveness" in the second verse are also used in the literal meaning; therefore, it means: By entering this city, I placed myself where I should not be; then cover me from enemies. Moreover, the sentence «فعلتها إذا وانا من الضالین» is used for dissimulation.