Is it permissible to pray in a mosque where areas affected by impurity have completely dried?

The questioner:
Honorable Shaykh, may Allah grant you success, this question concerns many of the worshippers among us. He says: Impurity affected some areas of the mosque,

The Shaykh:
Some, yes, some what?

The questioner:
Some areas of the mosque, due to drops falling from the bathroom above the mosque onto the mosque carpets, and now the area has completely dried.

The Shaykh:
Placing a bathroom above a mosque is wrong in the first place; this is not permissible. The bathroom should be moved away from the mosque, or the mosque moved away from the bathroom. Yes. And if something impure falls from it, one does not pray on it, because one of the conditions for the validity of the prayer is the purity of the place. When the Bedouin urinated in a part of the mosque, the Prophet (peace and blessings be upon him) had his urine washed by pouring water on it until it became pure. Yes.