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

Mauritius

Under Article 42, a person may be an elector if they are a citizen of at least 18 years of age and reside in the constituency in which they wish to vote. Electors shall elect members of The Parliament of Mauritius which consists of 70 members and elects the President. (Constitute Project, “Mauritius’ Constitution of 1968 with Amendments through 2016”).

Voting Rights and Suffrage · Country sources (all rights) · Years mentioned: 1968, 2016 · Last edited 2022-12-28 · Edit on GitHub