The Prophet of Islam is the last Prophet of God and the hierarchy of prophethood ends with him. This is one of the necessary precepts of Islam.
What is meant by necessary is that whoever joins the ranks of the Muslims must understand that all Muslims believe this and that this is among their decisive beliefs. That
is, just as those who have dealings with Muslims know that they emphasize the principle of unity, they must also know that the seal of the prophethood by the Prophet of Islam is also agreed to by all and there is no group of Muslims who are in anticipation of the coming of another prophet.
In truth, the movement of humanity upon its way towards perfection has passed through various states with sending of the prophets and they have attained a level upon this way so that they can stand on their own two feet. That is, by relying upon the universal teachings of Islam, they can solve their problems.
In other words, Islam is the final law and it is the age of maturity of humanity. From the point of view of belief, it is the most perfect of contents of religious thought and from the point of view of practice, it has so been formulated that it is coordinated with every age and every generation.