If there is no reason to believe that it’s haraam then you can get it. You can inquire about it’s provenance. If there is reason to suspect it then you should disobey them but be very diplomatic with them.

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You should find a place to pray that is secluded, and mustn’t pray in public unless as a necessity. In this case, you can keep your face covered and you can pray on any ground whether clean or dirty as long as there is no najasah or impurity that prevents prayer.

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