This is why engraved stone tablets remain the standard storage medium for religious texts. Easy to read anywhere, especially if you use a burning bush for lighting.
They should come with a cave for storage, else wind will erode the inscriptions. Running water will destroy them too. Even the cave may collapse on it.
A continuous revelation is more sustainable
Yep, plenty of gravestones are weathered to the point of illegibility after 100 years. Pick that mineral carefully. Or maybe go with a ceramic?
Oral tradition could be good too if only the authors would ever bother to add error correction. Unfortunately this revolutionary distributed tech is held back by lazy implementations.