LL·MS·001 Picátrix, or Ghāyat al-ḤakīmArabic, about the eleventh century. Latin translation at the court of Alfonso X, about 1256. Attested
The great compendium of astral magic: talismanic images, planetary hours, suffumigations and the theory of drawing celestial virtue down into matter. Nearly everything later European magic does with planetary timing has a root somewhere in this book.
We read it in the study circle a few paragraphs at a time, because it rewards slowness and punishes skimming.
Recommended edition: The Complete Picatrix, Greer & Warnock, in my Bookshop
Handle withThe Latin is a translation of a translation, and it diverges from the Arabic in places that matter. Where a modern edition notes a variant, the variant is usually the interesting part.