πρώιρα

From LSJ

ἄνω ποταμῶν ἱερῶν χωροῦσι παγαί → the springs of sacred rivers flow upward, backward to their sources flow the streams of holy rivers

Source

Greek (Liddell-Scott)

πρώιρα: ποιητ. ἀντὶ πρῷρα, Σιμωνίδ. 32.