Uthman bin 'Asim bin Husayn عثمان بن عاصم بن حصين أبو حصين · The Book of the Sunnah

"I heard Ibn 'Abbas saying: 'We used to memorize Ahadith, and Ahadith were memorized from the Messenger of Allah (ﷺ). But if you go to the extremes of either exaggeration or negligence (in narrating Ahadith), there is no way we can trust your Ahadith.'"

"The Messenger of Allah (ﷺ) said: 'I do not know how long I will stay among you, so follow the example of these two after I am gone,' and he pointed to Abu Bakr and `Umar."