John 6:70

ἀπεκρίθη αὐτοῖς· οὐκ ἐγὼ ὑμᾶς τοὺς δώδεκα ἐξελεξάμην; καὶ ἐξ ὑμῶν εἷς διάβολός ἐστιν.

Rough Word-by word:
he answered to them, "Not I you all the twelve I chose? And from you all one [a] devil is."

Smooth Translation:
He answered them, "Did I not choose you, the twelve? And from you all one is a devil."

ἀπεκρίθη verb aorist passive indicative 3rd singular from ἀποκρίνομαι (I answer) "he answered"

αὐτοῖς pronoun dative plural masculine "to them"

οὐκ adverb of negation "not"

ἐγὼ pronoun nominative 1st singular "I"

ὑμᾶς pronoun accusative 2nd plural "you all"

τοὺς definite article accusative plural masculine "the"

δώδεκα numeral accusative plural masculine "twelve"

ἐξελεξάμην verb aorist middle indicative 1st singular from ἐκλέγω (I call out, I choose) "I chose"

καὶ conjunction "and"

ἐξ genitive preposition "from, out of"

ὑμῶν pronoun genitive 2nd plural "you all"

εἷς numeral nominative singular masculine "one"

διάβολός noun nominative singular masculine "[a] devil"

ἐστιν verb present indicative 3rd singular from εἰμί (I am) "he is"