Zurayq said, "I wrote to Umar ibn Abd al-Aziz also, 'What do you think about a man who is slandered or his parents are slandered and both or only one of them are dead?' He said, Umar wrote to me, 'If he forgives, his pardon is permitted for himself. If his parents are slandered and one or both of them are dead, take the judgement of the Book of Allah for it unless he wants to veil it.' "
Yahya said, "I heard Malik say, 'That is because the slandered man might fear that if that is unveiled about him, a clear proof might be established. If it is according to what we have described, his pardon is permitted."
Arabic : Book 41, Hadith 1520