What is the ruling on praying in a mosque that contains a grave? And is there a difference between that and performing the funeral prayer in it?

Al-Huwaini: Regarding the prohibition of praying in a mosque that contains a grave, does this also include the prohibition of performing the funeral prayer in that mosque?

The Shaykh : One does not perform any prayer in a mosque that contains a grave, due to the prohibition of the Messenger (peace be upon him) regarding that in mass-transmitted reports. We had compiled, or we compiled what was available to us at that time, in the book *Tadhkir al-Sajid 'an Ittiyad al-Qubur Masajid* (Warning the One Who Prostrates from Taking Graves as Mosques).
Al-Huwaini: Some people attributed the prohibition to bowing and prostrating. That is, they said the funeral prayer has no prostration, so consequently, some may assume that the prohibition of praying in a mosque with a grave is because one prostrates and bows to the deceased or the buried person. So they said, where the cause is absent, the ruling is absent. Is this correct?

The Shaykh : What is the cause?
Al-Huwaini: The suggestion that the prostration is directed to the owner of the grave.

The Shaykh : Where did this cause come from? This is a rational cause, not a transmitted one. Therefore, it is not permissible to base a legal ruling on it that contradicts the general texts. This question ends first, because there is another person raising his hand. You have finished this question, so rest.
Abu Layla : ... .

The Shaykh : ... No problem ... What do I say to him regarding this question, or is it a new question? He said it is a new question ...
Abu Layla : May Allah reward you with good.