R. Chalafta Ish Kfar Chaninah says: If ten sit in judgment, the Shechinah abides among them, as it is written (Psalms 82:1): "G-d stands in the congregation of the Almighty" [and a "congregation" is not less than ten, as it is written in respect to the spies (Numbers 14:27): "How long for this evil congregation!" (Joshua and Kalev are excluded, leaving ten)]. And whence (is this derived) even for five? From (Psalms 82:1): "In the midst of the judges [(three judges and the litigants)] shall He judge." And (whence is this derived) even for three? From (Amos 9:6): "And He founded His bond upon the earth." [(three:) fire, air, and water (which circle the foundation of the earth) — whence it is seen that three is a "bond." Or from (Exodus 12:22): "a bundle (three stalks) of hyssop." There are texts which read: And whence do we derive even five? From "And He founded His bond upon the earth." A man "bonds" with one hand, on which there are five fingers. And the (five) fingers of the hand collectively are called a "bond." And the beginning of the verse reads: "He builds His ascents in the heavens." That is, the Shechinah, which is in the heavens, descends to the earth when there is a bond (of men) engaged in Torah study. And whence do we derive even three? From "In the midst of the judges (three) shall He judge."] And whence do we derive even two? From (Malachi 3:16): "Then the fearers of the L rd spoke to each other [(two are implied)] and the L rd listened and heard, etc." and whence do we derive even one? From (Exodus 20:21): "Wherever I mention My name, I shall come to you and bless you."