Prostration in Prayer

 

Here is the illustration of how the ancient Jews pray in the prayer from the book "To Pray as a Jew" by Rabbi Hayim Halevy Donin:

 

 

In wikipedia, it explains:

 

In Judaism, the Talmudic texts as well as writings of Gaonim and Rishonim indicate that prostration was common among many Jewish communities until some point during the Middle Ages. Members of the Karaite denomination practice full prostrations during prayers. Ashkenazi Orthodox Jews prostrate during Rosh Hashana and Yom Kippur as did Yemenite Jews during the Tachanun part of regular daily Jewish prayer until somewhat recently. Ethiopian Jews traditionally prostrated during a holiday specific to their community known as Sigd. Sigd comes from a root word meaning prostration in Amharic, Aramaic, and Arabic. There is a move among Talmide haRambam to revive prostration as a regular part of daily Jewish worship.