"It is He who sent His Messenger with guidance and the religion of truth" (referring to) Islam, "to manifest it over all religion." Al-Hasan’s interpretation: So that it prevails over the religions. Ibn Abbas’s interpretation: So that the Prophet is made to prevail over all religions; meaning: over all the laws of religion. The Messenger of Allah (peace be upon him) was not taken by death until Allah had completed that.

Interpretation of Surah al-Fath, Verse 29.