Deuteronomy 4:9 echoes the same call to diligent watchfulness — remember what you saw and teach it, while 4:15 warns against idolatry from seeing no form.

Deuteronomy 4:12 describes the same event: they heard words but saw no form—reinforcing the warning against making idols.

Deuteronomy 4:23 directly applies the warning: because you saw no form, do not make any carved image — a specific command from the same context.

Deuteronomy 5:8 repeats the same prohibition against carved images—reinforcing the warning in Deuteronomy 4:15.

Hebrews 1:3 describes Christ as the exact imprint of God's nature—a direct contrast to the 'no form' seen at Horeb.

2 Corinthians 4:4-6 reveals God's glory now seen in Christ's face—contrasting with the 'no form' at Sinai.

Joshua 23:11 uses the same phrase 'be very careful' — here directed to loving God, mirroring the self-watchfulness commanded in Deuteronomy 4:15.

1 Chronicles 28:10 says 'be careful' — a direct verbal parallel to Deuteronomy 4:15's 'watch yourselves very carefully', applied to building the temple.

Proverbs 4:23 commands guarding the heart with all vigilance, closely paralleling the careful watching of yourselves in Deuteronomy 4:15.

In 2 Kings 17:12, Israel serves idols despite God's explicit command—exactly what this verse warns against.

In Romans 1:23, Paul describes exchanging God's glory for images—the very idolatry Deuteronomy 4:15 warns against.

In Isaiah 40:25, God's incomparability reinforces that no image can represent Him, since Israel saw no form at Horeb.

Exodus 20:4 is the second commandment forbidding carved images—the very law Deuteronomy 4:15 warns to obey.

Numbers 12:8 says Moses beholds the form of the LORD—contrasting with the people at Horeb who saw no form.

Exodus 32:1 records the golden calf—the very sin Deuteronomy 4:15 warns against, showing the consequence.

Isaiah 40:18 asks who can liken God to an image—echoing the same prohibition based on seeing no form.

Psalm 119:9 shows how to keep pure: by guarding according to God's word — echoing the careful self-watch in Deuteronomy 4:15.

Exodus 23:13 warns against even mentioning other gods—a related prohibition that deepens the call to avoid idolatry.