Numbers 14:12 records God's threat to strike all Israel with pestilence; the spies' death by plague in 14:37 is a partial execution of that judgment.

Numbers 13:32 records the evil report that led to the plague—the immediate cause.

Numbers 20:3 recalls the deaths of the spies as a reference point for the people's complaint.

1 Corinthians 10:10 warns against murmuring, referencing the wilderness generation destroyed by the destroyer—directly ties to the murmuring that led to the spies' plague.

Hebrews 3:17 reflects on the wilderness generation whose bodies fell—a direct NT parallel to the plague on the spies.

Jude 1:5 says the Lord destroyed those who did not believe after saving them—this includes the spy plague as an example.