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

Palau

Article IV(4) of the 1981 constitution ensures “Every person has the right to be secure in his person, house, papers and effects against entry, search and seizure” (Constitute Project, “Palau 1981 rev. 1992").

https://constituteproject.org/constitution/Palau_1992?lang=en

Privacy Rights · Country sources (all rights) · Years mentioned: 1981, 1992 · Last edited 2022-12-28 · Edit on GitHub