Numbers 35:30 requires two or three witnesses for a death sentence — the OT law Jesus cites to establish church discipline procedure.

Deuteronomy 17:6 is the OT law requiring two or three witnesses for capital punishment, which Jesus here applies to church discipline.

Deuteronomy 19:15 is the exact OT source Jesus quotes — requiring two or three witnesses to establish any matter.

In John 8:17, Jesus cites the same OT principle about two witnesses, applying it to his own testimony and the Father's.

In 2 Corinthians 13:1, Paul quotes the same OT law, using it to warn the Corinthians that his next visit will be decisive.

In 1 Timothy 5:19, Paul applies the two-witness rule specifically to accusations against elders — a parallel to Jesus' church discipline context.

In 1 Kings 21:13, the two-witness rule is exploited to condemn Naboth unjustly — a negative example of the same legal principle.

In Hebrews 10:28, the writer refers to the OT law of two witnesses as the basis for capital punishment, contrasting it with the worse penalty for rejecting Christ.