What is the ruling on entering the mosque with a condom?

If the barrier is pure, there is no harm in entering the mosque with it. However, if it is impure or has become impure, it is not permissible to bring it into the mosque. Something that has become impure is like something impure if the impurity itself remains. Some scholars are of the view that it is permissible to enter the mosque with something impure if it is covered by something pure. Nevertheless, it is preferable not to enter the mosque with it if it is impure or has become impure. As for praying with it, the prayer is definitively invalid if it is impure or has become impure.