Section 187

Whoever, being bound by law to render or furnish assistance to any public servant in the execution of his public duty, intentionally omits to give such assistance, shall be punished with imprisonment for a term which may extend to one month or with fine which may extend to four hundred ringgit or with both; and if such assistance is demanded of him by a public servant legally competent to make such demand for the purposes of executing any process lawfully issued by a Court, or of preventing the commission of an offence, or of suppressing a riot or affray, or of apprehending a person charged with or guilty of an offence, or of having escaped from lawful custody, shall be punished with imprisonment for a term which may extend to six months or with fine which may extend to one thousand ringgit or with both.

Penal Code 123