John 8:17

καὶ ἐν τῷ νόμῳ δὲ τῷ ὑμετέρῳ γέγραπται ὅτι δύο ἀνθρώπων ἡ μαρτυρία ἀληθής ἐστιν.

Rough Word-by-word:
also in the law and the yours it is written that of two men the testimony true it is.

Smooth Translation:
and even in your own law it is written that the testimony of two men is true.

καὶ conjunction used adverbially "also/even"

ἐν dative preposition "in"

τῷ definite article dative singular masculine "the"

νόμῳ noun dative singular masculine "law"

δὲ post positive conjunction "and/but"

τῷ definite article dative singular masculine "the"

ὑμετέρῳ adjective dative singular masculine "yours" (note: emphatic - "your own")

γέγραπται verb perfect passive indicative 3rd singular from γράφω (I write) "it is written"

ὅτι conjunction "that/because"

δύο numeral genitive plural masculine "of two"

ἀνθρώπων noun genitive plural masculine "men"

ἡ definite article nominative singular feminine "the"

μαρτυρία noun nominative singular feminine "testimony"

ἀληθής adjective nominative singular feminine "true"

ἐστιν verb present indicative 3rd singular from εἰμί (I am) "[she] it is"