Saad bin Ubada said, "If I saw a man with my wife, I would strike him with the sword, with its sharp edge, not the flat side."This reached the Messenger of Allah ﷺ, and he said, "Are you amazed at Saad's jealousy? By Allah, I am more jealous than he is, and Allah is more jealous than I am. It is because of Allah's jealousy that He has forbidden indecencies, both the open and the hidden. No one is more jealous than Allah, and no one loves to accept excuses more than Allah. For this reason, Allah sent the messengers as bearers of glad tidings and as warners. And no one loves praise more than Allah. For this reason, Allah has promised Paradise."
قال سعد بن عبادة: لو رأيت رجلا مع امرأتي لضربته بالسيف، غير مصفح عنه. فبلغ ذلك رسول الله ﷺ، فقال: أتعجبون من غيرة سعد، فوالله، لأنا أغير منه، والله أغير مني، من أجل غيرة الله حرم الفواحش ما ظهر منها وما بطن، ولا شخص أغير من الله، ولا شخص أحب إليه العذر من الله، من أجل ذلك بعث الله المرسلين مبشرين ومنذرين، ولا شخص أحب إليه المدحة من الله، من أجل ذلك وعد الله الجنة.
Bukhari narrated it in the Book of Hudud (6846), and Muslim in the Book of Lian (17:1499), and this wording is his, both of them through Abu Awana, from Abdul-Malik bin Umayr, from Warrad, the scribe of Mughira, from Mughira bin Shuba, who said, and then he mentioned it.