Pausanias 7.23.3 (tr. W.H.S. Jones):
I heard too another tale about the water, how that it is a useful remedy for both men and women when in love; if they wash in the river they forget their passion. If there is any truth in the story the water of the Selemnus is of more value to mankind than great wealth.
ἤκουσα δὲ καὶ ἄλλον ἐπ᾿ αὐτῷ λόγον, τὸ ὕδωρ τοῦ Σελέμνου σύμφορον καὶ ἀνδράσιν εἶναι καὶ γυναιξὶν ἐς ἔρωτος ἴαμα, λουομένοις ἐν τῷ ποταμῷ λήθην ἔρωτος γίνεσθαι. εἰ δὲ μέτεστιν ἀληθείας τῷ λόγῳ, τιμιώτερον χρημάτων πολλῶν ἐστιν ἀνθρώποις τὸ ὕδωρ τοῦ Σελέμνου.