c. 420
Else will all things be lies which, on account of a certain similitude of things to be signified, although they never were done, are related to have been done. … Nor is it only in authors of secular letters, as in Horace, that mouse speaks to mouse, and weasel to fox, that through a fictitious narration a true signification may be referred to the matter in hand; whence the like fables of Æsop being referred to the same end, there is no man so untaught as to think they ought to be called lies: but in Holy Writ also, as in the book of Judges, the trees seek them a king, and speak to the olive, to the fig and to the vine and to the bramble. Which, in any wise, is all feigned, with intent that one may get to the thing which is intended, by a feigned narration indeed, yet not a lying one, but with a truthful signification.
Augustine of Hippo, Against Lying 28