The Incident of al-Ifk (The Slander of Aisha)

After a military expedition, Aisha was accidentally left behind when the army moved camp at night. She was found and escorted back by Safwan ibn al-Mu'attal. The chief hypocrite Abdullah ibn Ubayy spread a vile accusation against Aisha's honor. For an entire month, the Prophet ﷺ and the community endured this trial. Then Allah revealed ten verses in Surah an-Nur (24:11-20) completely exonerating Aisha and establishing that false accusation of chaste women requires four witnesses, with flogging for those who cannot produce them.