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As we stated above (21:8), there is a mitzva to pray three times a day: Ma’ariv (the evening prayer), Shaĥarit (the morning prayer), and Minĥa (the afternoon prayer). On Shabbat, additions are made to the prayers to elevate them and express the day’s sanctity. These additions include liturgical poems and psalms, some of which are traditionally sung. At the conclusion of Shaĥarit on Shabbat, Musaf (the additional prayer service) is recited.
After the services, there is a custom to greet the rabbi and wish him Shabbat Shalom. True, the primary connection with the rabbi should be based upon Torah study – listening to sermons and attending Torah classes. Nevertheless, for someone who has difficulty making it to the rabbi’s classes, greeting him is a way to fulfill the mitzva.
