Passage 3.19.4
πεποίηται δὲ ἐπὶ τοῦ βωμοῦ καὶ ἡ Δημήτηρ καὶ Κόρη καὶ Πλούτων, ἐπὶ δὲ αὐτοῖς Μοῖραί τε καὶ Ὧραι, σὺν δέ σφισιν Ἀφροδίτη καὶ Ἀθηνᾶ τε καὶ Ἄρτεμις· κομίζουσι δʼ ἐς οὐρανὸν Ὑάκινθον καὶ Πολύβοιαν, Ὑακίνθου καθὰ λέγουσιν ἀδελφὴν ἀποθανοῦσαν ἔτι παρθένον. τοῦτο μὲν οὖν τοῦ Ὑακίνθου τὸ ἄγαλμα ἔχον ἐστὶν ἤδη γένεια, Νικίας δὲ ὁ Νικομήδους περισσῶς δή τι ἔγραψεν αὐτὸν ὡραῖον, τὸν ἐπὶ Ὑακίνθῳ λεγόμενον Ἀπόλλωνος ἔρωτα ὑποσημαίνων.
On the altar are carved Demeter and Kore, as well as Plouton; above them stand the Moirai (Fates) and the Horai (Seasons), and together with these goddesses are Aphrodite, Athena, and Artemis. They are depicted bringing up to heaven Hyakinthos and Polyboia, his sister who, they say, died while still a virgin. Now, this statue of Hyakinthos already has a beard, but Nikias, son of Nikomedes, depicted him especially handsome in order to recall the love that Apollo is said to have felt toward Hyakinthos.