his sons - the two sons of the king of the north, Seleucus Callinicus, upon his death by a fall from his horse, namely, Seleucus Ceraunus and Antiochus the Great.
one shall ... come - Ceraunus having died, Antiochus alone prosecuted the war with Ptolemy Philopater, Euergetes’ son, until he had recovered all the parts of Syria subjugated by Euergetes.
pass through - like an “overflowing” torrent (Dan 11:22, Dan 11:26, Dan 11:40; Isa 8:8). Antiochus penetrated to Dura (near Caesarea), where he gave Ptolemy a four months’ truce.
return - renew the war at the expiration of the truce (so Dan 11:13).
even to his fortress - Ptolemy’s; Raphia, a border-fortress of Egypt against incursions by way of Edom and Arabia-Petraea, near Gaza; here Antiochus was vanquished.