Acts 3:17
And now, brethren, I wot that through ignorance ye did it, as did also your rulers.
Cross-references
Acts 7:40 shows Israel's ignorance in rejecting Moses — parallel to Peter's claim that they acted in ignorance regarding Jesus.
Acts 13:27 explicitly states the rulers' ignorance in condemning Jesus — directly parallel to Peter's statement.
Numbers 15:24-31 distinguishes sins of ignorance from defiant sins — the same distinction Peter uses to mitigate the Jews' guilt.
In Luke 23:34, Jesus prays 'Father, forgive them, for they know not what they do' — the same ignorance that Peter cites to offer mercy.
John 16:3 states persecutors act in ignorance of the Father — the same root cause for the rulers' actions in Acts 3:17.
1 Corinthians 2:8 directly says the rulers did not know, or they would not have crucified the Lord — confirming their ignorance.
1 Timothy 1:13 shows Paul acting ignorantly and receiving mercy — mirroring the ignorance and offer of forgiveness in Acts 3:17.
Numbers 15:27 provides the OT law for unintentional sin — the same principle of ignorance requiring atonement underlies Acts 3:17.