Deuteronomy 17:6

At the mouth of two witnesses, or three witnesses, shall he that is worthy of death be put to death; but at the mouth of one witness he shall not be put to death.

Cross-reference

Deuteronomy 19:15 repeats the two-witness requirement for any crime, reinforcing the legal principle applied here to capital cases.

Numbers 35:30 applies the same two-witness rule to murder cases, extending the principle from this general legal statute.

Matthew 18:16 applies the two-witness principle to church discipline, directly citing the OT law as authority.

John 8:17 Citation

John 8:17 cites the same OT witness law, using it to validate Jesus' own testimony about himself.

John 8:18 Allusion

John 8:18 demonstrates Jesus' use of the two-witness rule: his own testimony plus the Father's fulfill the legal requirement.

Paul directly cites the two-witness principle from Deuteronomy for confirming facts in church discipline.

Paul applies the same two-witness standard to accusations against elders, echoing the OT judicial rule.

Hebrews references the death penalty on two witnesses from Deuteronomy to contrast with greater judgment for rejecting Christ.