Traditionally, Jews recite prayers three times daily, Shacharit, Mincha, and Ma'ariv with a fourth prayer, Mussaf added on Shabbat and holidays. At the heart of each service is the Amidah or Shemoneh Esrei. Another key prayer in many services is the declaration of faith, the Shema Yisrael (or Shema). The Shema is the recitation of a verse from the Torah (Deuteronomy 6:4): Shema Yisrael Adonai Eloheinu Adonai Echad—"Hear, O Israel! The Lord is our God! The Lord is One!"
Most of the prayers in a traditional Jewish service can be recited in solitary prayer, although communal prayer is preferred. Communal prayer requires a quorum of ten adult Jews, called a minyan. In nearly all Orthodox and a few Conservative circles, only male Jews are counted toward a minyan; most Conservative Jews and members of other Jewish denominations count female Jews as well.
In addition to prayer services, observant traditional Jews recite prayers and benedictions throughout the day when performing various acts. Prayers are recited upon waking up in the morning, before eating or drinking different foods, after eating a meal, and so on.
The approach to prayer varies among the Jewish denominations. Differences can include the texts of prayers, the frequency of prayer, the number of prayers recited at various religious events, the use of musical instruments and choral music, and whether prayers are recited in the traditional liturgical languages or the vernacular. In general, Orthodox and Conservative congregations adhere most closely to tradition, and Reform and Reconstructionist synagogues are more likely to incorporate translations and contemporary writings in their services. Also, in most Conservative synagogues, and all Reform and Reconstructionist congregations, women participate in prayer services on an equal basis with men, including roles traditionally filled only by men, such as reading from the Torah. In addition, many Reform temples use musical accompaniment such as organs and mixed choirs.