Passage 1.32.2
Πεντελῆσι μὲν Ἀθηνᾶς, ἐν Ὑμηττῷ δὲ ἄγαλμά ἐστιν Ὑμηττίου Διός, βωμοὶ δὲ καὶ Ὀμβρίου Διὸς καὶ Ἀπόλλωνός εἰσι Προοψίου. καὶ ἐν Πάρνηθι Παρνήθιος Ζεὺς χαλκοῦς ἐστι καὶ βωμὸς Σημαλέου Διός· ἔστι δὲ ἐν τῇ Πάρνηθι καὶ ἄλλος βωμός, θύουσι δὲ ἐπʼ αὐτοῦ τοτὲ μὲν Ὄμβριον τοτὲ δὲ Ἀπήμιον καλοῦντες Δία. καὶ Ἀγχεσμὸς ὄρος ἐστὶν οὐ μέγα καὶ Διὸς ἄγαλμα Ἀγχεσμίου.
On Pentelicus there is a sanctuary of Athena; upon Hymettus is a statue of Zeus Hymettius, and altars of Zeus Ombrius and Apollo Proopsios. On Parnes there is a bronze image of Zeus Parnethius and an altar of Zeus Semaleus. There is also another altar on Mount Parnes, on which sacrifices are offered at one time to Zeus Ombrius ("Rain-giver"), at another to Zeus Apemius ("Averter of harm"). Also, there is Mount Anchesmus, a hill not very large, and a statue of Zeus Anchesmius.