Sunan Abi Dawud 5008
سنن أبي داود#5008HasanOne day when a man got up and spoke at length Amr ibn al-'As said If he had been moderate in what he said:It would have been better for him. I heard the Messenger of Allah (ﷺ) say: I think (or, I have been commanded) that I should be brief in what I say, for brevity is better
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Al-AlbaniHasan Isnaad
Muhammad Muhyi Al-Din Abdul HamidHasan Isnaad
Zubair Ali ZaiIsnaad Hasan
In-book reference: 43:236