Plutarch, Demetrius
Bernadotte Perrin, Ed.

6. When Antigonus learned of the battle, he said that Ptolemy had conquered beardless youths, but must now fight with men;¹ however, not wishing to humble or curtail the spirit of his son, he did not oppose his request that he might fight again on his own account, but suffered him to do it. And not long after, up came Cilles, a general of Ptolemy, with a splendid army, intending to drive Demetrius out of all Syria, and looking down upon him because of his previous defeat. [2] But Demetrius fell upon him suddenly and took him by surprise, put him to rout, and captured his camp, general and all; he also took seven thousand of his soldiers prisoners, and made himself master of vast treasures. However, he rejoiced to have won the day, not by reason of what he was going to have, but of what he could restore, and was delighted, not so much with the wealth and glory which his victory brought, as with the power it gave him to recompense the kindness and return the favour of Ptolemy. [3] And yet he did not do this on his own responsibility, but first wrote to his father about it. And when his father gave him permission and bade him dispose of everything as he liked, he sent back to Ptolemy both Cilles himself and his friends, after loading them with gifts. This reverse drove Ptolemy out of Syria, and brought Antigonus down from Celaenae; he rejoiced at the victory and yearned to get sight of the son who had won it.