John 3:33

ὁ λαβὼν αὐτοῦ τὴν μαρτυρίαν ἐσφράγισεν ὅτι ὁ θεὸς ἀληθής ἐστιν.

Rough Word-by-word:
The one who received of him the testimony he has acknowledged that the God true is.

Smooth Translation:
The one who received his testimony has acknowledged that God is true.

ὁ definite article nominative singular masculine "the"

λαβὼν aorist active participle nominative singular masculine from λαμβάνω (I receive) "one who received"

αὐτοῦ pronoun genitive singular masculine "of him"

τὴν definite article accusative singular feminine "the"

μαρτυρίαν noun accusative singular feminine "testimony"

ἐσφράγισεν verb aorist active indicative 3rd singular from σφραγίζω (I acknowledge) "he has acknowledged"

ὅτι conjunction "that"

ὁ definite article nominative singular masculine "the"

θεὸς proper noun nominative singular masculine "God"

ἀληθής adjective nominative singular masculine "true"

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