Is the arrangement of the surahs in the mushaf the work of the Companions, or were they revealed to the Prophet (peace and blessings be upon him) in this order?

Question:
Honorable Shaykh, may Allah grant you success, he says: Is the arrangement of the surahs in the mushaf the work of the Companions, or were they revealed to the Prophet (peace and blessings be upon him) in this order?

Answer:
The arrangement of the verses is obligatory, because by the explicit text of the Messenger (peace and blessings be upon him), it was he who ordered them to write such-and-such a verse next to such-and-such a verse; so it is by explicit text. As for the arrangement of the surahs, this is by ijtihad (independent legal reasoning); it was not stated to be by explicit text except by a few scholars, and the majority hold that it is the ijtihad of the Companions. Therefore, it is permissible to recite this surah before that one, whereas it is not permissible to recite this verse before that one. Yes.