Well, not exactly. It is from E. H. Plumptre's Prometheus Bound
Here are the lines (484 in particular) from Smyth (the one who wrote that nit-pickin' grammar) and there is no mention of reason. It appears that Plumptre has adeptly plugged reason in for mantikhV which is speaking of the art of a prophet. This is where we get the word mantic from, as in praying mantis.
Hear the rest and you shall wonder the more at the arts and resources I devised. This first and foremost: if ever man fell ill, there was no defence--no healing food, [480] no ointment, nor any drink--but for lack of medicine they wasted away, until I showed them how to mix soothing remedies with which they now ward off all their disorders. And I marked out many ways by which they might read the future, [485] and among dreams I first discerned which are destined to come true; and voices baffling interpretation I explained to them, and signs from chance meetings. The flight of crook-taloned birds I distinguished clearly-- which by nature are auspicious, [490] which sinister--their various modes of life, their mutual feuds and loves, and their consortings; and the smoothness of their entrails, and what color the gall must have to please [495] the gods, also the speckled symmetry of the liver-lobe; and the thigh-bones, wrapped in fat, and the long chine I burned and initiated mankind into an occult art. Also I cleared their vision to discern signs from flames,which were obscure before this. [500] Enough about these arts. Now as to the benefits to men that lay concealed beneath the earth--bronze, iron, silver, and gold--who would claim to have discovered them before me? No one, I know full well, unless he likes to babble idly. [505] Hear the sum of the whole matter in the compass of one brief word--every art possessed by man comes from Prometheus.Here we see all the arts do come from him, arts meaning techne. And that is found in the Greek. Aeschylus may still be the culprit, but so far we don't know who is first to attribute "reason" as one of the gifts.