Res gestae 23.6.33

23.6.33

Qui cum superioris Indiae secreta fidentius penetraret, ad nemorosam quandam venerat solitudinem, cuius tranquillis silentiis praecelsa Brachmanorum ingenia potiuntur, eorumque monitu, rationes mundani motus et siderum, purosque sacrorum ritus (quantum colligere potuit) eruditus, ex his, quae didicit, aliqua sensibus magorum infudit, quae illi cum disciplinis praesentiendi futura, per suam quisque progeniem, posteris aetatibus tradunt.

When Zoroaster had boldly made his way into the unknown regions of Upper India, he reached a wooded wilderness, whose calm silence the lofty intellects of the Brahmins control. From their teaching he learned as much as he could grasp of the laws regulating the movements of the earth and the stars, and of the pure sacrificial rites. Of what he had learned he communicated something to the understanding of the Magi, which they, along with the art of divining the future, hand on from generation to generation to later times.