John 6:69

καὶ ἡμεῖς πεπιστεύκαμεν καὶ ἐγνώκαμεν ὅτι σὺ εἶ ὁ ἅγιος τοῦ θεοῦ.

This verse translated literally said:

and we have believed (perfect - had done and known and hence had believed and still believing) and have known (perfect - had done and known and hence knew and still knowing) that YOU are the Holy one of God