Mu'awiya said
Be cautious about ahadith except those which were current during the reign of Umar, for he exhorted people to fear Allah, the Exalted and mMajestic. I heard the Messenger of Allah (ﷺ) as saying: He upon whom Allah intends to bestow goodness, He confers upon him an insight in religion; and I heard the Messenger of Allah (ﷺ) as saying: I am the treasurer. To one whom I give out of (my own) sweet will, he would be blessed in that, but he whom I give (yielding to) his constant begging and for his covetousness is like one who would eat, but would not be satisfied.
Mu'awiya reported Allah's Messenger (ﷺ) as saying
Do not press in a matter, for I swear by Allah, none of you who asks me for anything and manages to get his request while I disdain it, will he be blessed in that which I give him.
'Amr b. Dinar reported from Wahb b. Munabbih
I went to his house in San'a' and he offered me nuts grown in his house to eat. And his brother said : I heard Mu'awiya b. Abu Sufyan saying that he had heard the Messenger of Allah (ﷺ) as saying , and then he made a mention (of a hadith) like one mentioned above.
Abd al-Rahman b. Auf reported
I heard Mu'awiya b. Abu Sufyan saying in an address that he had heard the Messenger of Allah (ﷺ) as saying: He to whom Allah intends to do good, He gives him insight into religion. And I am only the distributor while Allah is the Bestower.