Muslims pray facing Mecca five times a day: at dawn, noon, mid-afternoon, sunset, and after dark. Prayer includes a recitation of the opening chapter (sura) of the Qur’an, and is sometimes performed on a small rug or mat used expressly for this purpose. Muslims can pray individually at any location or together in a mosque, where a leader in prayer (imam) guides the congregation. Men gather in the mosque for the noonday prayer on Friday; women are welcome but not obliged to participate. After the prayer, a sermon focuses on a passage from the Qur’an, followed by prayers by the imam and a discussion of a particular religious topic.