John Lightfoot on Luke 24:45

[Then opened he their understanding.] When it is said, that by the imposition of the hands of the apostles the gift of tongues and of prophecy was conferred ("they spake with tongues, and they prophesied," Acts 19:6), by 'prophecy' nothing may be better understood than this very thing, that the minds of such were opened, that they might understand the Scriptures: and perhaps their 'speaking with tongues' might look this way in the first notion of it, viz., that they could understand the original wherein the Scriptures were writ.