Section 334 of IPC 1860: Voluntarily causing hurt on provocation
Voluntarily causing hurt on provocation-Indian Penal Code
Whoever voluntarily causes hurt on grave and sudden provocation, if he neither intends nor knows himself to be likely to cause hurt to any person other than the person who gave the provocation, shall be punished with imprisonment of either description for a term which may extend to one month, or with fine which may extend to five hundred rupees, or with both.