BUKHARI 6846: from al-Mughīrah —
Saʿd bin Ubada said, "If I found a man with my wife, I would kill him with the sharp side of my sword." When the Prophet ﷺ heard that he said, "Do you wonder at Saʿd's sense of ghira (self-respect)? Verily, I have more sense of ghira than Saʿd, and Allah has more sense of ghira than I."

البخاري ٦٨٤٦: عن المغيره —
سَعْدُ بْنُ عُبَادَةَ لَوْ رَأَيْتُ رَجُلاً مَعَ امْرَأَتِي لَضَرَبْتُهُ بِالسَّيْفِ غَيْرَ مُصْفَحٍ فَبَلَغَ ذَلِكَ النَّبِيَّ ﷺ فَقَالَ أَتَعْجَبُونَ مِنْ غَيْرَةِ سَعْدٍ لأَنَا أَغْيَرُ مِنْهُ وَاللَّهُ أَغْيَرُ مِنِّي


Sound (Bukhārī)
Bukhārī > Ḥudūd (Limits and Punishments Set by Allah) > § Whoever saw his wife with another man and killed him
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