Luke 6:12

Accusative αὐτὸν functions as the subject of the infinitive in an indirect statement. Himself to go out.

In Greek, when an infinitive like ἐξελθεῖν is used in indirect discourse, its subject appears in the accusative case, rather than the nominative. For example, in λέγει αὐτὸν ἐξελθεῖν ("He says that he is going out"), αὐτόν functions as the subject of ἐξελθεῖν, following a standard syntactical rule in Ancient Greek.