Laudator Temporis Acti

Thomas Wright, A Selection of Latin Stories: From Manuscripts of the Thirteenth and Fourteenth Centuries (London: Percy Society, 1842), p. 110 (CXVIII, "De muliere sacerdoti obviante"), tr. G.G. Coulton, Life in the Middle Ages, Vol. I: Religion, Folk-Lore and Superstition (Cambridge: Cambridge University Press, 1928), pp. 35-36:

Here is an example of a woman who used to make the sign of the Cross, as it is said, when she met her priest in the morning, and who answered that she did this lest some mishap should betide her that day. Whereunto he said: "Dost thou believe that it will be the worse to thee for having met me?" And she replied: "I fear it." Then said he: "It shall indeed be to thee as thou hast believed; for thou shalt have one mishap because thou hast met me." And, seizing her by the shoulders, he cast her into a muddy ditch, saying: "Be it unto thee even as thou hast believed!"

Exemplum de quadam muliere se signante, ut fertur, in mane cum sacerdoti obviaret, quæ respondit quod hæc fecit ne aliquod infortunium illo die ei accideret. Cui ille, "Credis quod tibi pejus contingat, quia mihi obviasti?" At illa, "Timeo," inquit. Cui ille, "Revera fiet tibi sicut credidisti, nam unum habebis infortunium quia mihi obviasti." Et ipsa per scapulas apprehensa, in foveam projecit lutosam, dicens, "Recte fiat tibi sicut credidisti."

Coulton (p. 36) adds:

In Germany the same superstition was attacked in the thirteenth century by the Franciscan Berthold of Regensburg (ed. Pfeiffer, vol. i, p. 264) : "Thus some folk believe in unlucky meetings, and that a wolf is lucky to fall in with—a wolf, that doth evil to all the world, and is so unclean a beast that he stinketh in men's nostrils and no man may thrive within scent of him!—and again they believe that an anointed priest is unlucky to meet; yet all our faith lieth on the priest, and God hath exalted him above all men!"

Cf. Patrick Leigh Fermor (1915-2011), Mani: Travels in the Southern Peloponnese (London: John Murray, 1958; rpt. New York: New York Review Books, 2006), p. 148:

We boarded Panayioti's little caique, the St. Nicholas, just before dawn broke. Four black-shawled women and a ragged priest clustered in the stern and, at the embarkation of the latter, Panayioti with a wink made the privy gesture of spitting to avert the Eye and the evil fortune which is supposed to dog the footsteps of priests, especially on a ship.*

* The alternative exorcism is to touch one's pudenda.

See also Jacob Grimm, Teutonic Mythology, tr. James Steven Stallybrass, Vol. III (London: George Bell & Sons, 1883), pp. 1124-1125.