Musnad Ahmad 626:35

Hisham ibn Abd al-Malik Abu al-Walid narrated to us, Abu 'Awanah narrated to us, from 'Abd al-Malik, from Warrad, the scribe of al-Mughirah, from al-Mughirah ibn Shu'bah, who said: Sa'd ibn 'Ubadah said: "If I saw a man with my wife, I would strike him with the sword, not with the flat side." This reached the Messenger of Allah (peace be upon him), and he said: "Are you amazed at the jealousy of Sa'd? By Allah, I am more jealous than him, and Allah is more jealous than me. Because of the jealousy of Allah, He has forbidden immoralities, both what is apparent of them and what is hidden. There is no person more jealous than Allah, and there is no person to whom an excuse is more beloved than Allah; for that reason, Allah sent the messengers as bringers of glad tidings and warners. And there is no person to whom praise is more beloved than Allah; for that reason, Allah promised Paradise."