The Meaning of Sa'd's Statement: If I Found a Man in My House, I Would Strike Him with the Sword

Question:
He says: Honorable Shaykh, may Allah grant you success, what is the meaning of Sa'd (may Allah be pleased with him) saying, "If I found a man in my house, I would strike him with the sword, even if he were armored," and is it permissible for every person to do that?

Answer:
This is not necessary. I say: Are all people like Sa'd (may Allah be pleased with him)? Otherwise, everyone who hates someone would go and bring him into his house and kill him, saying, "I found him with my wife." This is not acceptable; it opens the door for people to do such things. But if a man is known for his jealousy and integrity, like Sa'd ibn Abi Waqqas or like Sa'd ibn Ubadah, this is specific. This is specific to Sa'd ibn Ubadah (may Allah be pleased with him).
As for ordinary people, this does not apply, because this opens the door to killing and treachery. Everyone who has an enemy would go and invite him, intending to honor him, then ambush him in his house and say, "I found a woman with him." Yes.