Matthew
Matthew 23:31ESV·traditional attribution

Thus you witness against yourselves that you are sons of those who murdered the prophets.

John Gill Reformed Baptist @doctorgill

Fill ye up then the measure of your fathers. Of their sins; for there were bounds and limits set how far they should proceed, and no further; as yet they had not got to the end of their iniquity: their fathers had gone great lengths in sin, but their iniquity was not yet full, as is said of the Amorites, Gen 15:16 these their sons were to fill it up.

Albert Barnes Presbyterian @notesbybarnes

Verse 31. Ye be witnesses unto yourselves. The emphasis, here, lies in the words "unto yourselves." It was an appeal to their conscience. It was not by their building the tombs that they were witnesses that they were the children of those who slew the prophets; but in spite of all this pretence to piety--under cloak of all this profession--they knew in their consciences, and...