Plutarch, Pompey
Bernadotte Perrin, Ed.

33. Pompey then invaded Armenia on the invitation of young Tigranes, who was now in revolt from his father, and who met Pompey near the river Araxes, which takes its rise in the same regions as the Euphrates, but turns towards the east and empties into the Caspian Sea. [2] These two, then, marched forward together, receiving the submission of the cities as they passed; King Tigranes, however, who had recently been crushed by Lucullus, but now learned that Pompey was rather mild and gentle in his disposition, received a Roman garrison into his palace, and taking with him his friends and kindred, set out of his own accord to surrender himself. [3] When he rode up to the Roman camp, two of Pompey's lictors came to him and bade him dismount from his horse and go on foot; for no man mounted on horseback had ever been seen in a Roman camp. Tigranes, accordingly, not only obeyed them in this, but also unloosed his sword and gave it to them; and finally, when he came into the presence of Pompey himself, he took off his royal tiara and made as if to lay it at his feet, and what was most humiliating of all, would have thrown himself down and clasped his knees in supplication. [4] But before he could do this, Pompey caught him by the hand and drew him forward, and after giving him a seat near himself, and putting his son on the other side, told him that he must lay the rest of his losses to Lucullus, who had robbed him of Syria, Phoenicia, Cilicia, Galatia, and Sophene; but that what he had kept up to the present time he should continue to hold if he paid six thousand talents to the Romans as a penalty for his wrongdoing; and that his son should be king of Sophene. [5] With these terms Tigranes was well pleased, and when the Romans hailed him as King, he was overjoyed, and promised to give each soldier half a mina of silver, to each centurion ten minas, and to each tribune a talent. But his son was dissatisfied, and when he was invited to supper, said that he was not dependent on Pompey for such honours, for he himself could find another Roman to bestow them. Upon this, he was put in chains and reserved for the triumph. [6] Not long after this, Phraates the Parthian sent a demand for the young man, on he plea that he was his son-in-law, and a proposition that the Euphrates be adopted as a boundary between his empire and that of the Romans. Pompey replied that as for Tigranes, he belonged to his father more than to his father-in-law; and as for a boundary, the just one would be adopted.