Σάρδις

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

Russian (Dvoretsky)

Σάρδῑς: ίων αἱ ион. = Σάρδεις.