Numbers 16:41
But on the morrow all the congregation of the children of Israel murmured against Moses and against Aaron, saying, Ye have killed the people of the Lord.
Cross-reference
Numbers 16:1-7 describes the initial rebellion by Korah, which the people now blame Moses for — directly linking to the grumbling.
Numbers 16:3 contains Korah's claim that the whole congregation is holy — the same argument behind the people's complaint in 16:41.
Numbers 20:4 repeats the same accusation 'you brought us to die', showing this grumbling pattern continues even after Korah's judgment.
Numbers 21:5 has the people speaking against God and Moses about manna, another example of complaining despite previous judgments.
Numbers 14:2 records earlier grumbling at Kadesh — a similar pattern of rebellion against Moses and Aaron.
Psalm 106:23 mentions Moses standing in the breach to turn away wrath — exactly the intercession after the grumbling in Numbers 16:41.
Exodus 14:11 is the first major grumbling against Moses at the Red Sea, showing a recurring pattern of blaming the leader when facing danger.
Exodus 15:24 records grumbling about water at Marah, another instance where the people immediately complain against Moses after a trial.
In 1 Corinthians 10:10, Paul directly warns against grumbling by citing this very wilderness incident as a warning.
Psalm 106:13 says they quickly forgot God's works — explaining the persistent grumbling after seeing His judgment.
Psalm 106:25-48 recounts Israel's repeated rebellions, including this incident — placing the grumbling in a larger pattern of disobedience.