Surah Al-Ahzab (The Enemy Alliance), Verse 58

وَالَّذِیْنَ یُؤْذُوْنَ الْمُؤْمِنِیْنَ وَالْمُؤْمِنٰتِ بِغَیْرِ مَا اكْتَسَبُوْا فَقَدِ احْتَمَلُوْا بُهْتَانًا وَّاِثْمًا مُّبِیْنًا 

Wallazeena yu'zoonal mu'mineena wal mu'minaati bighairi mak tasaboo faqadih tamaloo buhtaananw wa ismam mubeenaa

“And those who annoy believing men and women undeservedly, bear (on themselves) a calumny and a glaring sin.”

Quran 33:58 (Yusuf Ali Translation)