Slandering ‘Aa’ishah implies insulting the Prophet (Peace & Blessings of Allaah be upon Him), because Allah, may He be glorified, says (interpretation of the meaning):
"Bad statements are for bad people (or bad women for bad men) and bad people for bad statements (or bad men for bad women). . . " [al-Noor 24:26]

Al-Haafiz ibn Katheer, may Allah have mercy on him, said: "I.e., Allah would not have made ‘Aa’ishah the wife of the Messenger of Allah (Peace & Blessings of Allaah be upon Him) if she had not been good, because he is better than any good person. If she had been bad, she would not have been fit to marry him from a shar‘i point of view, and Allah would never even have decreed it.."