The ruling on praying in a mosque that contains a grave, and whether a distinction is made between that and the funeral prayer performed in it?

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

The Shaykh : No, is it not a prayer?! No prayer of any kind is performed in a mosque that contains a grave, due to the prohibition of the Messenger (peace be upon him) regarding that in mass-transmitted reports (mutawatir) which we had collected, or we collected what was available to us at that time, in the book "Warning the Prostrator from Taking Graves as Mosques."
Al-Hawini: Some people attributed the prohibition to bowing and prostrating; meaning 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, for example the one buried there. So he said, where the cause is absent, the ruling is absent; is this correct?

The Shaykh : What is the cause?
Al-Hawini: The suggestion of prostrating to the owner of the grave.

The Shaykh : Where did this cause come from? This is a rational cause, not a transmitted one, and therefore it is not permissible to base a legal ruling on it that contradicts the general texts. Is this question finished, above all else?
Al-Huwayni: Yes.

The Shaykh : So there is a brother raising his hand. Have you finished this question?
Al-Huwayni: Yes.

The Shaykh : Are you still on this question? Then rest.

Another questioner : ... .

The Shaykh : Yes?

Another questioner : ... .

The Shaykh : No problem, what am I saying to him? What am I saying to him? Are you on this question, or a new question? He said a new question, so we returned to what...