Is it permissible to deliver a sermon at a wedding?

The questioner : Some people deliver a sermon during the gathering for the wedding feast. Is this permissible?

The Shaykh : Yes, it is permissible to deliver a sermon at a gathering of people for a wedding if the situation calls for it, such as if one witnesses a wrong or hears a wrong, in which case he stands up and admonishes the people about that wrong and similar matters, or if he is asked about certain things, he speaks about them and those around him hear him. This is not a problem. However, making these gatherings a place for sermons gives me some concern, because the Messenger of Allah (peace and blessings be upon him) said to the woman who had just married: So the occasion is one of joy and happiness for this event. When the Messenger (peace and blessings be upon him) said "who sings," he meant the permissible singing that is not accompanied by music or any of the forbidden instruments of amusement, because what is permissible at a wedding is pure, clean singing, and there is no harm in it being accompanied by the hand drum. But if it is accompanied by the drum, or by music, or by the lute, or by the rabab, then this is not permissible.