Ruling on entering a mosque that contains a grave in order to denounce the evil

The questioner also asks His Eminence the Shaykh about this and says: May I convey this in this mosque, given the situation as I described?
Answer: He should convey it, but he should not pray with them if the graves are in the mosque.
The presenter: If the grave is inside the mosque.
The Shaykh: He should sit, and when they pray, he should remind them, or at other times, in other gatherings. However, if the grave is outside the mosque, there is no harm; he may pray with them, remind them of Allah, and teach them their religion. But if the grave is inside the mosque, or if the graves are inside the mosque, one does not pray in them , as he (peace and blessings be upon him) said. However, the believer should seek out appropriate times. If he comes to them after they have prayed, he reminds them, or he reminds them before the prayer and says: "I would love to pray with you, were it not for this grave." Mosques that contain graves are not to be prayed in. He teaches them and guides them, or after the prayer, he likewise guides them, and there is no blame in that. And praise be to Allah. Yes.
The presenter: May Allah reward you with good.