Parallel
Matthew 23:31
Robinson-Pierpont Byzantine Textform · Berean Standard Bible
Ὥστε μαρτυρεῖτε ἑαυτοῖς ὅτι υἱοί ἐστε τῶν φονευσάντων τοὺς προφήτας·
So you testify against yourselves that you are the sons of those who murdered the prophets.