The site of Arad is well known for its pre-exilic Yahwistic sanctuary and, especially, for the many Hebrew ostraca discovered in the ruins of the fortress. See here (scroll down a bit) and here and links.
I still don't think that Jesus or Moses smoked weed. But this is the first evidence I know of that the ancient Israelites used psychoactive substances in their worship practices. See my comments in this post, which also, coincidentally, has a Shavuot connection.
Also, incidentally, for some reason the archangel Metatron has recently acquired a connection with cannabis.
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