72. Vulpes, Lupus, et Tria Vera. In lupum vulpes quae inciderat misella,  vivam se ut caperet precabatur neque vetulam interimeret. Qui “Si mihi  tres,” ait, “easque veras dixeris sententias, per Panem vitae parcam  tuae.” Vulpes contra, “Utinam primum non fuisse obviam factus mihi! Dein  utinam occurrisses caecus! Et super his habe,” inquit, “tertiam: utinam  non ad seriorem pervenias aetatem nec mihi denuo obviam occurras!”    
Here is an image for  the story (
image source) showing the defiant fox.
M0072 = Perry159. Source: Babrius 53 (translated into Latin prose). This is Perry 159. The wolf swears by Pan, the Greek god of the woods and hills. For another story of “three true things,” see #543.