Is it obligatory to believe that all current versions of the Gospel and Torah were written after the death of the Prophet, peace be upon him, or are some of them ancient and predated his birth by centuries, as Christians claim due to the absence of any mention of his description therein? And what is the opinion of scholars on this matter?

Muslims are not required to believe in anything for which there is no evidence from the Sharia. The claim that copies of the Torah were written after the death of the Prophet Muhammad, peace and blessings be upon him, is incorrect. The Torah existed during his time, peace and blessings be upon him, and he cited it to them, as is established in the hadith of stoning.

As for the absence of the Prophet Muhammad’s name, peace and blessings be upon him, in the books of the People of the Book, this is a lie caused by the distortion of the rabbis. The previous heavenly books prophesied his coming, and his name and attributes are mentioned therein, as the Holy Quran clarified in numerous verses.

Scholars have extracted prophecies of his prophethood, peace and blessings be upon him, from the books available today, and the reports of the People of the Book, both those who embraced Islam and others, have been consistently transmitted regarding his mention therein. This is what prompted the Ansar to believe in him. Sheikh al-Islam Ibn Taymiyyah mentioned that knowledge of the prophets' prophecies about him can be obtained from several sources, including what is found in the books available today and the accounts of those who have examined those books.

Sheikh Al-Zindani also mentioned in his book prophecies in the Gospel of Barnabas and the Books of Isaiah and Habakkuk, which include the mention of the Prophet Muhammad's name, peace and blessings be upon him, his attributes, and prophecies of his coming.