Passage 1.6.4
Πτολεμαῖον δὲ αὐτίκα ἐς τὰ πράγματα ὁ Περδίκκου θάνατος ἐπέστησε· καὶ τοῦτο μὲν Σύρους καὶ Φοινίκην εἷλε, τοῦτο δὲ ἐκπεσόντα ὑπὸ Ἀντιγόνου καὶ φεύγοντα ὑπεδέξατο Σέλευκον τὸν Ἀντιόχου, καὶ αὐτὸς παρεσκευάζετο ὡς ἀμυνούμενος Ἀντίγονον. καὶ Κάσσανδρον τὸν Ἀντιπάτρου καὶ Λυσίμαχον βασιλεύοντα ἐν Θρᾴκῃ μετασχεῖν ἔπεισε τοῦ πολέμου, φυγὴν λέγων τὴν Σελεύκου καὶ τὸν Ἀντίγονον φοβερόν σφισιν εἶναι πᾶσιν αὐξηθέντα.
The death of Perdiccas at once brought Ptolemy into affairs of state. He immediately secured Syria and Phoenicia, and offered refuge to Seleucus, the son of Antiochus, who had been driven out by Antigonus and fled to him. Ptolemy himself began preparing to resist Antigonus, and persuaded Cassander, son of Antipater, and Lysimachus, the king ruling in Thrace, to enter the war, pointing to Seleucus's flight and urging that Antigonus, grown in power, had become a great danger to them all.