What is the oldest written source in this country that mentions this right?

Singapore

Singapore’s 1963 Constitution contains no protection for press freedom, but does protect freedom of speech and expression (Constitute Project, “Singapore’s Constitution of 1963 with Amendments through 2016”).

Freedom of the Press · Country sources (all rights) · Years mentioned: 1963, 2016 · Last edited 2022-12-28 · Edit on GitHub