Dative of the Participle expressing Time.—In expressions of time a participle is often used with the dative of the person interested in the action of the subject, and especially to express the time that has passed since an action has occurred (cp. “and this is the sixth month with her, who was called barren” St. Luke i. cross36).
ἀποροῦντι δ' αὐτῷ ἔρχεται Προμηθεύς
Ξενοφῶντι πορευομένῳ οἱ ἱππεῖς ἐντυγχάνουσι πρεσβύ_ταις
a. A temporal clause may take the place of the participle:
τῇ στρατιᾷ, ἀφ' οὗ ἐξέπλευσεν εἰς Σικελία_ν, ἤδη ἐστὶ δύο καὶ πεντήκοντα ἔτη
Herbert Weir Smyth [n.d.], A Greek Grammar for Colleges; Machine readable text [info] [word count] [Smyth].