en_tn/act/07/51.md

Stephen continues his defense before the Jewish council that he began in Acts 7:1.

You people who are stiff-necked...

Stephen shifted from identifying with the Jewish leaders to rebuking them.

uncircumcised in heart

"disobedient in heart." Stephen may have been comparing them to the Gentiles, which they would have understood as an insult.

Which of the prophets did your forefathers not persecute?

This is a rhetorical question where Stephen was rebuking them. Can be translated as, "Your forefathers persecuted every prophet!" (See: rc://en/ta/man/translate/figs-rquestion)

Righteous One

This refers to the Christ, the Messiah.

murderers of him

"murderers of the Righteous One" or "murderers of the Christ."