What is the source for requiring ten men (a “minyan”) for certain religious services?
Ten men are required for reciting prayers in which G-d’s name is sanctified (Megillah 23b), such as the Kaddish or Kedushah. This is derived from the verse “I will be sanctified among the Children of Israel” (Lev. 22:32), and from the fact that in Gen. 42:5, Jacob’s ten sons (excluding Joseph and Benjamin) are referred to as “the Children of Israel”.
