Khatm e Nabuwat as in Quran
Verse 40 Surah Al-Ahzab (33) "Muhammad is not the father of any man among you, but he is the messenger of Allah and the Seal of the Prophets; and Allah is ever Aware of all things.
An Excellent Book on this topic is Khatm e Nubuwat by Mufti Muhammad Shafi