Is circumcision a prerequisite in Islam

Q: Some students come to study in the Islamic University of Al-Madinah Al-Munawwarah after embracing Islam, and some of them are old. They come to the university uncircumcised and some people want them to be circumcised. Is circumcision a necessity for them and is it permissible at that age?

A: All praise be to Allah Alone and peace and blessings be upon His Messenger, his family and Companions. Circumcision is not a necessity, but it is an act of Sunnah (commendable act) according to the majority of the scholars. It is also a Sunnah for those mentioned, if they will not be exposed to any harm.May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.