Strabo, Geography
H.C. Hamilton, Esq., W. Falconer, M.A., Ed.

Stories circulated for the purpose of exalting the fame [of eminent persons] are not received with equal favour by all; the object of the inventors was flattery rather than truth; they transferred, for example, the Caucasus to the mountains of India, and to the eastern sea, which approaches close to them, from the mountains situated above Colchis, and the Euxine Sea. These are the mountains to which the Greeks give the name of Caucasus, and are distant more than 30,000 stadia from India. Here they lay the scene of Prometheus and his chains, for these were the farthest places towards the east with which the people of those times were acquainted. The expeditions of Bacchus and of Hercules against the Indi indicate a mythological story of later date, for Hercules is said to have released Prometheus a thousand years after he was first chained to the rock. It was more glorious too for Alexander to subjugate Asia as far as the mountains of India, than to the recess only of the Euxine Sea and the Caucasus The celebrity, and the name of the mountain, together with the persuasion that Jason and his companions had accomplished the most distant of all expeditions when they had arrived in the neighbourhood of the Caucasus, and the tradition that Prometheus had been chained on Caucasus at the extremity of the earth, induced writers to suppose that they should gratify the king by transferring the name of the mountain to India.