John 2:25

25 He did not need any testimony about mankind, for he knew what was in each person.

Read John 2:25 Using Other Translations

And needed not that any should testify of man: for he knew what was in man.
and needed no one to bear witness about man, for he himself knew what was in man.
No one needed to tell him about human nature, for he knew what was in each person’s heart.