Genesis 20:4

But Abimelech had not come near her: and he said, Lord, wilt thou slay also a righteous nation?

Cross-references

In 20:6, God directly confirms Abimelech's protest: 'I kept you from sinning against me.' God validates Abimelech's claim of innocence in not approaching Sarah.

In 18:23, Abraham asks, 'Will you sweep away the righteous with the wicked?' Both passages raise the question of whether God will destroy the innocent.

In 2 Samuel 4:11, David condemns killing a righteous person — the same principle Abimelech invokes: God should not punish the innocent along with the guilty.