A Talmudic Midrash obligates prayer three times a day, instituted in honor of our three patriarchs, Abraham, Isaac and Jacob.
The Afternoon Service, called Minḥah (or Mincha), is much shorter than the Morning Service and has no unique components.
Minhah, the Afternoon Service, begins with the Torah service, including selections from Leviticus and the haftarah on the Book of Jonah.
Tahanun is the name for a series of penitential prayers that follow the Amidah during the Morning and Afternoon Services.
The Minhah Service on Saturday Shabbat afternoon contains a number of significant additions to the weekday Afternoon Service.