Quintus Curtius Rufus, History of Alexander 9.1.35

9.1.35

Relicto igitur Sopithe in suo regno ad fluvium Hypasin processit Hephaestione, qui diversam regionem subegerat, coniuncto.

I must observe, however, that I copy from preceding writers more than I myself believe, for I neither wish to guarantee statements of the truth of which I am doubtful, nor yet to suppress what I find recorded. Alexander therefore leaving Sopithes in possession of his kingdom, advanced to the river Hyphasis, where he was rejoined by Hephaestion who had subdued a district situated in a different direction. Phegeus, who was king of the nearest nation, having beforehand ordered his subjects to attend to the cultivation of their fields according to their wont, went forth to meet Alexander with presents and assurances that whatever he commanded he would not fail to perform.