Amidah

Amidah (, "The Standing Prayer"), plural form also known as (, "The Eighteen"  ) is the central prayer of the Jewish liturgy. The term "to be standing", is a reference to the fact that they say the prayer standing, having their feet together, looking in the direction of Jerusalem.

This prayer is one of the prayers found in siddur, the traditional Jewish prayer book. As long as the central prayer of Judaism the Amidah is often designated simply as, "prayer", in Rabbinic literature.

The tractate of the first order of Mishnah and Talmud,  deals, among other topics, with the Amidah prayer. The obligation to pray three times a day, which was established by Ezra and codified in this treaty, is fulfilled by reciting the Amidah.