What is the ruling on praying in a mosque where it is said that its land was usurped, even though its builder stated that the land belonged to a Jewish man who was exiled from Egypt, so it became state property, and he built the mosque upon it? And does the sin of praying on usurped land fall upon the usurper or upon the worshippers? And what is the recompense for whoever spreads false rumors about the mosque's land being usurped?

It is not permissible for a Jew or anyone else to be expelled from their land. The land in question is not state-owned, and the development that has taken place on it is pure usurpation. Usurping land is forbidden and carries severe warnings. Jurists have explicitly stated that it is impermissible to establish a mosque on usurped land, and prayer therein is unanimously considered unlawful. Prayer in the aforementioned mosque is not permissible. The majority of scholars hold that prayer therein is valid, though sinful, unlike the Hanbalis who deem it void. The sin falls upon the one who usurped the land and upon the worshiper who is aware of this. Whoever spreads this news is considered to be enjoining good and forbidding evil.