Prayer: Is Prayer Valid on Usurped Land If Standing on a Mat or Board?

Practical Laws of Islam as per the teachings of Imam Khamenei

Prayer: Is Prayer Valid on Usurped Land If Standing on a Mat or Board?

English:

Question #382:

Will the prayer of a person be valid if he performs it on usurped land while standing on a prayer mat or a wooden board or something similar?

Answer #382:

The prayer performed on usurped land is void even if one stands on a prayer mat or something else put on the land.

-Imam Khamenei, Practical Laws of Islam, Importance and Conditions of Prayer