ἐξέχρη, since in Attic χράω contracts in η:
: Pind. Ol. 7.92 “ἔχρεον” (v.l. ἔχραον): Lucian Alex. 22 “ἔχρα καὶ ἐθέσπιζε” (common dialect). τὰ πόλλ̓, cp. El. 564 “τὰ πολλὰ πνεύματ̓”, those frequent winds. The prophecy was made to Oedipus at Delphi when he went thither in his youth from Corinth, to ask whether he was indeed the son of Polybus, the Corinthian king, and Meropè. The god did not solve his doubt,—“ἄλλα δ᾽ ἄθλια καὶ δεινὰ καὶ δύστηνα προὔφηνεν λέγων” (O. T. 789). Eur. makes Oedipus, while still at Thebes, tell Antigone of a χρησμός which doomed him to die at ἱερὸς Κολωνός (Phoen. 1705 ff.). Far more poetical is the conception of Sophocles, that Apollo had appointed the sign, but not named the place.“Ἀπόλλων
χρυσοκόμης ἔχρη πίονος ἐξ ἀδύτου
”Tyrtaeus 3. 3