John 8:27

They understood not that he spake to them of the Father.
KJV

οὐκ ἔγνωσαν ὅτι τὸν πατέρα αὐτοῖς ἔλεγεν.
Greek NT

Et non cognoverunt quia Patrem ejus dicebat Deum.
Vulgate

They perceived not that he spake to them of the Father.
ASV

And they understood not that he called God his Father.
Douay-Rheims

In the original Greek

7 distinct Greek words appear in this verse.

αὐτός

autos

pronoun · 5564×

γινώσκω

ginosko

verb · 222×

λέγω

lego

verb · 2256×

οὐ

particle · 1626×

πατήρ

pater

noun · 412×

ὁ

article · 19778×

ὅτι

oti

conjunction · 1299×

1 passage from patristic writers, Reformers, and church catechisms citing this verse.

Isa 6:9 — And he said, Go, and tell this people, Hear ye indeed, but understand not; and see ye indeed, but perceive not.
John 8:43 — Why do ye not understand my speech? even because ye cannot hear my word.