Reminder to myself and others -- beware of backbiting. It's something we do and witness so frequently, yet in the eyes of God it is a heinous crime... some hadith on the matter:
The Prophet (s) said: “The listener is one of the two backbiters.” [Al-Fayd
al-Kashani, Al-Mahajjat al-Bayda', vol. 5, p. 260]
The Prophet (s) once gave counsel to Abu Dharr (r) , saying: “O Abu Dharr! Beware of backbiting, for backbiting is graver than adultery (zina’).” Abu Dharr (r) said: “Why is that so, O Messenger of Allah?” He (s) replied: “That is because when a man commits adultery and then repents to God, God accepts his repentance. However, backbiting is not forgiven until forgiven by its victim.”
[Al-Hurr al-`Amili, Wasai'l al-Shi`ah, vol. 8, hadith no. 18312]
“O ‘Ali! When someone hears the backbiting of his Muslim brother committed in his presence, yet he does not rally to his assistance despite being capable of doing so, God shall humiliate him in the world and in the Hereafter.” [Al-Hurr al-`Amili, Wasa'il al-Shi`ah, vol. 8, hadith no. 16336]
The Noble Messenger (s) said: “Whoever backbites a Muslim spoils his fasts and breaks his wudu', and shall come on the Day of Resurrection with his mouth's stench more putrid than a carcass', and it shall irk those who are with him in his station (mawqif). If he dies before repenting, his death is like that of one who dies while considering permissible that which is prohibited by God, the Exalted and the Glorious.” [Al-Hurr al-`Amili, Wasa'il al-Shi`ah, vol. 8, hadith no. 16316]
Imam al-Sadiq (‘a) narrated from the Noble Messenger (s) who is once said to have forbidden both backbiting and listening to it. Then he (s) said: “Lo, whoever does a favor to his brother by refuting his backbiting upon hearing it in a gathering, God shall save him from a thousand kinds of evils in this world and in the Hereafter. And if he does not do so despite his ability to refute it, on him shall be the burden of one who commits his backbiting seventy times.” [Al-Hurr al-`Amili, Wasa'il al-Shi`ah, vol. 8, hadith no. 16316]