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

Namibia

Under Article 17, every citizen of Namibia, who has reached the age of 18, has a right to suffrage. Article 28 states that the President shall be elected under direct, universal, and equal suffrage. The National Assembly, under Article 46, shall be composed of 96 members who are elected by general, direct, and secret ballot. 8 other members shall be appointed by the President. (Constitute Project, “Namibia’s Constitution of 1990 with Amendments through 2014”).

Voting Rights and Suffrage · Country sources (all rights) · Years mentioned: 1990, 2014 · Last edited 2022-12-28 · Edit on GitHub