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

Lebanon

Under Article 21, every Lebanese citizen twenty-one years or older has the right to vote in public elections. Elections elect members to the Board of Deputies. (Constitute Project, Lebanon’s Constitution of 1926 with Amendments through 2004”).

Voting Rights and Suffrage · Country sources (all rights) · Years mentioned: 1926, 2004 · Last edited 2022-12-28 · Edit on GitHub