Question

A sermon read on Friday prayers in the name of a ruling Muslim king is

Answer 1

Khutbah is the answer.

Answer 2

A sermon meant for public preaching in the Islamic tradition. The Islamic tradition is held on Friday's noon congregation. Similar sermons can be called for on the two festival days. Besides this, other oratory and preaching sermons at other occasions are called 'Dars'. 

The khutbah originates from the practice of the Islamic prophet, Muhammad, who used to deliver words of exhortation, instruction, or command at gatherings for worship in the mosque, which consisted of the courtyard of his house in Medina.