Demetrius, with the largest and best part of the cavalry, clashed with Antiochus, the son of Seleucus; he fought brilliantly and routed his enemy, but by pursuing him too fiercely and eagerly he threw away the victory. For he himself was not able to turn back and rejoin his infantry, since the enemy's elephants were thrown in his way;
Edition :
Plutarch. Plutarch's Lives. with an English Translation by. Bernadotte Perrin. Cambridge, MA. Harvard University Press. London. William Heinemann Ltd. 1920. 9.
Remark :
long-term consequence: According to Plutarch, the reason for Antigonus' defeat and death is Demtrius' pursuit of Antiochus. This is mentioned later in the paragraph.
Also, Antigonus looses his life during the battle. This is mentioned in 29.5.
Notes :
Details are taken from the New Pauly.
http://referenceworks.brillonline.com/entries/brill-s-new-pauly/ipsus-e527120
