Keng Huat Film Co. v Makhanlal
Mohamed Azmi F J stated-
"It is a well-established rule that the court cannot construe a legal document such as a lease by the acts of the parties or their own understanding of the document . As far as our law is concerned, the exclusion of oral by documentary evidence, is governed by sections 91 to 92 of the Evidence Act 1950.
Section 91 provides that the contents of a document must be proved by the document itself, and section 92 provides that subject to certain provisos, no evidence of any oral evidence or statement shall be admitted for the purpose of contradicting, varying, adding to, or subtracting from its terms "evidence of negotiations, or of the parties" intentions ought not to be received,".