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

Kuwait

Kuwait’s 1962 constitution has been reinstated twice, but it does not mention privacy rights generally. It does, however, protect the inviolability of the home in Article 38 (Constitute Project, “Kuwait 1962 reinst. 1992”).

https://constituteproject.org/constitution/Kuwait_1992?lang=en

Privacy Rights · Country sources (all rights) · Years mentioned: 1962, 1992 · Last edited 2022-12-28 · Edit on GitHub