The ruling on building a mosque over a grave

Question:
May Allah reward you, Honorable Shaykh. He says in the rest of his question: What is the ruling if the grave is in the rear courtyard of the mosque, or to its right, or to its left, or if the grave is inside the mosque’s sacred precinct?

Answer:
We have explained all of this. We said that as long as the grave is connected to the mosque from any direction, then this is a mosque built over a grave, and prayer in it is invalid, whether in the courtyard, on the sides, at the qiblah, or in the rear. Among the greatest things built against Islam is the construction of mosques over graves. Therefore, the Prophet (peace and blessings be upon him) warned his Ummah with the utmost warning, even in the last moment of his life (peace and blessings be upon him). Does this not indicate the severity of this matter?
When the fourth century of the blessed centuries ended and what followed it came, and the Shi'ah and the Sufis delved deep into the Muslim community, mosques were built over graves. Muslims continue to suffer from this affliction to this day. They are still suffering from this malignant cancer in the body of the Muslims until now, except for the countries that Allah has blessed with the call to tawhid (the oneness of Allah), where these graves were demolished and the mosques were removed from them. However, they are few in number compared to the entire Islamic world, and these few are between enemies.
They look down on them and incite against them, and they demand the restoration of these shrines that were demolished. But , so no one who abandons them or opposes them will harm them until Allah comes to them, as the Prophet (peace and blessings be upon him) informed us of this.