Penal Code Section 335
Causing grievous hurt on provocation
335. Whoever voluntarily causes grievous hurt on grave and sudden provocation, if he neither intends nor knows himself to be likely to cause grievous hurt to any person other than the person who gave the provocation, shall be punished with imprisonment for a term which may extend to four years or with fine which may extend to four thousand ringgit or with both.
Explanation— The last two sections are subject to the same provisos as Exception 1 of section 300.
Please refer to the Attorney General's Chamber of Malaysia's website for the latest law.