續一切經音義 3.87

3.87

讖緯（上楚𧮂反釋名云讖纖也謂其義纖微也下緯字前已釋）。

Prophecy and apocrypha (讖緯: the first character has the fanqie 楚 + 𧮂. The Shiming says: "Chen (讖) means minute (纖), referring to its meaning being minute and subtle." The second character, wei (緯), was explained previously).