(Those who attain belief shall promptly establish the Divine System in the community, and the Masjid would assume the role of the community center. The believers will assemble in the Masjid for prayer, and to address social welfare and community action). O You who have chosen to be graced with belief! Join not the Salat congregation if your mind is beclouded for any reason, until you understand what you utter, else you might say senseless words that disturb the assembly. Physical cleanliness contributes to moral purity. So, take a bath after ceremonial impurity. If you are traveling, or are ill, or coming from the privy, and cannot find water, take a little clean sand or earth and lightly rub your faces and hands, before entering the Masjid. (This will help you prepare psychologically for the assembly (5:6)). Allah pardons and absolves your imperfections.