According to Rabbinic law, it takes at least ten men to
constitute a legally convened congregation. Nearly a thousand
pounds were expended every year by the synagogues of the
metropolis to hire (minyan) men to make up the congregational
number, and thus ensure the due observance of this regulation.
When the Holy One--blessed be He!--enters the synagogue, and does not
find ten men present, His anger is immediately stirred; as it is said
(Isa. i. 2), "Wherefore, when I came, was there no man? When I called,
there was none to answer?"
THE TALMUD, _Berachoth_, fol. 6, col. 2.