How did scholars reach a consensus on the impurity of carrion and flowing blood based on the verse: "Say, 'I find not in that which has been revealed to me anything forbidden to be eaten by an eater except that it be carrion or flowing blood or the flesh of swine, for indeed, that is impure'" (فَإِنَّهُ رِجْسٌ), even though the pronoun "that" (فَإِنَّهُ) refers only to swine?

The exegetes differed regarding the pronoun in Allah Almighty's saying: "{for indeed it is defilement}" [Qur'an 6:145]. Some said it refers to the flesh of swine, while others said it refers to all that was mentioned before it. This latter view was preferred by the author of Al-Tahrir wa Al-Tanwir, who explained that the singular pronoun refers to what has been mentioned, meaning "for indeed what has been mentioned is defilement." This is permissible in the Arabic language.