(254) بَابُ التَّجَارِبِ
Hisham ibn 'Urwa reported that his father said, "I was sittingwith Mu'awiya and he muttered to himself and then came to his senses. [Thisis when he was ill.] He said, 'No one has forbearance without it beingput to the test.' He repeated that three times."
Reference: Al-Adab Al-Mufrad 564
In-book reference: Book 30, Hadith 27
English translation: Book 30, Hadith 564