Noun of the Pronoun " Him" in the verse " Then Allah caused His peace of reassurance to descend upon him"

One challengeable problem in commenting the Quran is that of “descending peace” in the verse 40 of Taubah, particularly noun of the pronoun “him” in: “Then Allah caused His peace of reassurance to descend upon him”. Fariqain Commentators have viewed on the verse based on some presuppositions and, therefore, failed to give correct and real view on it. Shiite scholars regard the pronoun as referring to the Prophet (s); while Sunni scholars have known it as returning to Abubakr and regard it as a great virtue for him. As is described in the paper, none of the two groups meet the truth in the field; as viewed in paper, the pronoun is a substitution for Abubakr but it may not be counted a virtue for him and God, the Exalted, by descending peace to Abubakr, kept the Prophet`s life; in other words, such a descending may be taken as a ground for keeping the Prophet`s life.