Surat Al-Ahzaab (The Clans) - الأحزاب

وَٱلَّذِينَ يُؤْذُونَ ٱلْمُؤْمِنِينَ وَٱلْمُؤْمِنَٰتِ بِغَيْرِ مَا ٱكْتَسَبُوا۟ فَقَدِ ٱحْتَمَلُوا۟ بُهْتَٰنًا وَإِثْمًا مُّبِينًا ﴿٥٨﴾

And those who speak evil things of the believing men and the believing women without their having earned (it), they are guilty indeed of a false accusation and a manifest sin.