Sayyiduna Ibn Abbas (may Allah be pleased with them both) said: "Do not think it bad for you; rather, it is good for you" [Surah An-Nur: 11] means that it is good for the Messenger of Allah (peace and blessings be upon him), a declaration of innocence for the leader of the believing women (Sayyidah Aishah), and good also for Abu Bakr, for Sayyidah Aishah's mother and for Safwan bin al-Mu'attal. Do not think the lie that was told to you bad for you; rather, it is good for you, because you will be rewarded for it.
Hadith Referenceالمعجم الكبير للطبراني / مسند النساء / 19477