The ruling on praying in a mosque built over a grave

The questioner : If it is not known which came first, the grave or the mosque, then there is no problem with praying in it.

The Shaykh : If it is not known, the default is that the entire earth is a mosque; the entire earth is a mosque, so

The questioner : Yes, how?

The Shaykh : The important point is that if we do not know which came first, he should say: Pray in the mosque, but do not face the grave, because the Prophet (peace and blessings be upon him) forbade that.

The questioner : If the path is to the north or east, not facing it directly or in line of sight.

The Shaykh : Meaning, to the person's right or left.

The questioner : Safety, the qiblah came, but he cannot face it directly.

The Shaykh : He does not face it; it does not harm him if the mosque was not built over the grave. The result is that in a mosque built over a grave, the prayer is invalid absolutely, and in a grave buried in a mosque, the prayer in the mosque is valid, except that one does not face the grave.