Is the prayer valid in mosques that have graves in their outer courtyards?

Question:
He says: We prayed in mosques, and there were graves in their courtyards, but they were not inside the mosque, and we do not know whether the grave came first and the mosque was built over it, or the mosque came first. The question is: What is the ruling on the prayers we performed, which number more than ten? And if we are required to repeat them, what is the form of the repetition, given that we are now in Makkah?

Answer:
If the graves are connected to the mosque from any direction, the prayer in it is not valid, because it is built over the graves. However, if the graves are separated from the mosque by a road or open land that acts as a barrier, there is no harm in that; pray in the mosque. If you prayed in a mosque with a grave connected to it, you must repeat the prayer, because the Prophet (peace and blessings be upon him) forbade praying at graves, and the prohibition implies invalidity. So you must repeat the prayers in order: the first day, the day after it, and the day after that, until you have completed all the prayers.