Numbers 14:42
Go not up, for the Lord is not among you; that ye be not smitten before your enemies.
Cross-reference
Deuteronomy 1:42 recounts the same event: the Lord's command not to fight because He is not with them, leading to defeat.
Joshua 7:12 states the same principle: the Lord not being with them causes defeat, directly echoing Numbers 14:42.
Leviticus 26:37 warns of being unable to stand before enemies, the same consequence as in Numbers 14:42 when the Lord is not present.
Deuteronomy 7:21 commands not to fear because God is with them — opposite of Numbers 14:42 where God's absence guarantees defeat.
Deuteronomy 31:17 describes God hiding His face and enemies devouring them — the same consequence of God's absence warned here.
Psalm 89:43 speaks of God turning back the sword and causing defeat — echoing the fate Israel faces without His presence.