Whoever abets the commission of an offence by the public generally or by any number or class of persons exceeding ten, shall be punished with imprisonment of either description for a term which may extend to seven years and with fine. Illustration. A affixes in a public place a placard instigating a sect consisting of more than ten members to meet at a certain time and place, for the purpose of attacking the members of an adverse sect, while engaged in a procession. A has committed the offence defined in this section.