It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that Sayyiduna Sa'd bin Ubadah al-Ansari (may Allah be pleased with him) said: "O Messenger of Allah! A man finds another man with his wife; should he kill him?" The Messenger of Allah (peace and blessings be upon him) said: "No." Sa'd said: "Rather yes, by the One who honoured you with the truth!" So the Messenger of Allah (peace and blessings be upon him) said: "Listen to what your chief is saying."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الأشربة والحد فيها / 17645