Exodus 19:24
And the Lord said unto him, Away, get thee down, and thou shalt come up, thou, and Aaron with thee: but let not the priests and the people break through to come up unto the Lord, lest he break forth upon them.
Cross-reference
Exodus 19:12 establishes the boundary command; verse 24 repeats the warning against breaking through to the Lord.
In Exodus 19:20, God calls Moses up the mountain; in verse 24, God instructs him to go down and then come up with Aaron.
In Exodus 19:21, God gives the same warning about the people not breaking through to gaze — repeated command to Moses.
Exodus 19:22 instructs priests to consecrate themselves to avoid God's wrath — directly parallel to the warning in Exodus 19:24.
Exodus 19:25 directly follows the command in 19:24: Moses goes down and tells the people — completing the instruction.
Exodus 34:2 again calls Moses up the mountain to meet God — echoing the summons in 19:24 after the covenant was broken.
Exodus 24:1 later allows Moses, Aaron, and elders to approach — building on the permission in 19:24 but expanding the circle.
2 Corinthians 3:7-9 describes the Sinai law as the 'ministry of condemnation' — directly echoing the deadly boundaries and warning in Exodus 19:24.
Hebrews 4:16 invites bold approach to God's throne — directly contrasting Exodus' warning not to break through.
Hebrews 10:19-22 declares confidence to enter God's presence through Christ's blood — opposite of Sinai's barriers.
Hebrews 12:18-25 contrasts the terrifying Mount Sinai with Mount Zion — showing the new covenant's superior access.
Hebrews 12:29 says God is a consuming fire — echoing the fiery theophany at Sinai in Exodus 19.