Slander

Whoever surreptitiously slanders a believing man or a woman, or says about him what is not in him, Allah, the Exalted, will place him on a hill of fire on the Day of Judgment, until he renounces what he said about him.

 

رسولُ اللَّهِ صلى اللَّه عليه وآله :  مَن بَهَتَ مؤمناً أو مؤمنةً أو قالَ فيهِ ما ليسَ فيهِ أقامَهُ اللَّهُ تعالى‏ يومَ القيامةِ على‏ تَلٍّ مِن نارٍ حتّى‏ يَخرُجَ مِمّا قالَهُ فيهِ . بحار الأنوار : 75 / 194 / 5 .

 The Prophet (SAWA) said, 'Whoever surreptitiously slanders a believing man or a woman, or says about him what is not in him, Allah, the Exalted, will place him on a hill of fire on the Day of Judgment, until he renounces what he said about him.' Bihar al-Anwar, v. 75, p. 194, no. 5