The ruling on praying in a mosque next to a grave that is visited

Question:
This questioner says: O Shaykh, may Allah preserve you, there is a wali (close friend of Allah) next to the mosque, and some people still visit this wali. Is it permissible to pray in this mosque?

Answer:
If it is outside the mosque, it does no harm. One should greet him and make du'a' (supplication) for him, if he is a Muslim. One should greet him and make du'a' for him. However, moving it to the cemetery is better and further from shubhah (a doubtful matter). Moving it to the cemetery is what should be done, so that fitnah (trial, discord or temptation) does not occur.
As for if it is inside the mosque, no, one does not pray in the mosque. If it is inside the mosque, the mosque must be demolished. If the mosque was built on top of it, then it is demolished. But if the grave is new and the mosque is old, the grave is dug up and moved to the cemetery. As for if the mosque was built on top of it and it is old, the mosque is demolished because it was built on graves. But if the mosque is old, but they introduced the dead body into it, then the dead body is dug up and moved to the cemetery. Yes.

The presenter: May Allah preserve you, O Shaykh, and guide your steps.