Ἀλεξάνδρου ἀνάβασις 5.29.5

5.29.5

καὶ ταῦτα οὐ χαλεπῶς πιστεύσας οὕτως ἔχειν Ἀβισάρῃ τε τῆς αὑτοῦ χώρας σατραπεύειν ἔδωκεν καὶ Ἀρσάκην τῇ Ἀβισάρου ἐπικρατείᾳ προσέθηκεν· καὶ φόρους οὕστινας ἀποίσουσι τάξας θύει αὖ καὶ ἐπὶ τῷ Ἀκεσίνῃ ποταμῷ. καὶ τὸν Ἀκεσίνην αὖ διαβὰς ἐπὶ τὸν Ὑδάσπην ἧκεν, ἵνα καὶ τῶν πόλεων τῆς τε Νικαίας καὶ τῶν Βουκεφάλων ὅσα πρὸς τῶν ὄμβρων πεπονηκότα ἦν ξὺν τῇ στρατιᾷ ἐπεσκεύασε καὶ τὰ ἄλλα τὰ κατὰ τὴν χώραν ἐκόσμει.

Chapter XXIX. — Alexander erects altars on the banks of the Hyphasis to mark the limits of his advance, recrosses the Hydraotes and Akesines and regains the Hydaspes
Then they shouted, as a mixed multitude would shout when rejoicing, and many of them shed tears. Some of them even approached the royal pavilion, and invoked many blessings on Alexander, because by them and them only did he permit himself to be vanquished. He then divided the army into brigades, which he ordered to prepare twelve altars to equal in height the highest military towers, and to exceed them in point of breadth, to serve as thankofferings to the gods who had led him so far as a conqueror, and also as a memorial of his own labours. When the altars had been constructed, he offered sacrifice upon them with the customary rites, and celebrated a gymnastic and equestrian contest. Having thereafter committed all the country west of the river Hyphasis to the government of Poros, he marched back to the Hydraotes. After crossing this river, he retraced his steps to the Akesines, and on arriving there found the city which he had ordered Hephaistion to fortify completely built. Herein he settled as many of the inhabitants of the neighbourhood as were willing to make it their domicile, and such also of the mercenary soldiers as were now unfit for further service. He then began to make preparations for the downward voyage to the Great Sea.
At this time Arsakes, ruler of the country adjoining the dominions of Abisares, together with the brother of Abisares and his other relatives, came to him, bringing presents such as the Indians consider the most valuable, and some thirty elephants sent by Abisares. They represented that Abisares was prevented from coming in person by illness — a statement which the ambassadors sent by Alexander to Abisares corroborated. Alexander, readily believing that such was the case, made Abisares satrap of his own dominions, and moreover placed Arsakes under his jurisdiction. Having then fixed the amount which was to be paid as tribute, he again offered sacrifice near the river Akesines. He then recrossed that river, and reached the Hydaspes where he employed his army in repairing the damage caused by the rains to the cities of Nikaia and Boukephala, and set the other affairs of the country in order.