Idioms 3: John 9:21b

αὐτὸν ἐρωτήσατε, ἡλικίαν ἔχει, αὐτὸς περὶ ἑαυτοῦ λαλήσει.

Ask him, he has age, he will speak about himself.  John 9:21b

A wonderful idiom!  Most translations render it “he is of age”.