Prayer and Religious Articles: Prayer and Blessings: Swaying During Prayer:
Why do we sway when we pray?
The Talmud Bavli (Berachos 28b) says that when a person prays,
he must bow until all the segments of his spine are separated;
the Talmud Yerushalmi says that a person who stands and prays
should bow at every prayer, based on the verse (Psalms 35:10)
"All my bones will say 'Ha-Shem, who is like You?'"
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