898. It is not permissible for a non-Mahram man and woman to be together in a place where they are unaccompanied and the entry of another is impossible, if they entertain the possibility of sin. The recommended precaution is that they should not pray in such a place.
899. Prayer in a place where a harp or similar instruments are being played, is not invalid, however, it is forbidden to listen to them. It is similarly forbidden to be present in such a gathering except for the purpose of impeding their use.
900. It is not permissible to pray on the roof top of the Kaaba unless one is compelled. The recommended precaution is that one should not pray inside the Kaaba. However, there is no problem in the case one is compelled.
901. There is no problem in praying a recommended prayer inside the Kaaba. It is in fact recommended to pray a two rak‘ah prayer opposite every rukn of the Kaaba.