Imam Khomeini’s guidance to those who Backbite their Fellow brothers in faith
My dear, be friendly to the servants of God who enjoy His mercy and bounty and who have been adorned with the robes of Islam and iman, and cultivate a heart-felt affection for them. Beware lest you feel enmity towards the beloved of God, for God Almighty is the enemy of the enemies of His beloved one and He will throw you out of the gardens of His mercy. The elect of God are hidden amongst His servants and who knows if this enmity on your part and your violation of the honor of this man of faith (mu’min) and your divulging of his defects will not be considered an offence against Divine honor?
The mu’minun are the awliya’ (friends) of God. Their friendship is the friendship of God; their enmity is the enmity of God. Beware of the wrath of God and the enmity of the intercessors on the Day of Judgment:
وَيْلٌ لِمَنْ شُفَعَاؤُهُ خُصَمَاؤُهُ.
Woe to him whose intercessors [i.e. those who were supposed to intercede in his favor] are his enemies.