Sunan Abu Dawud
5008
Hasan Isnaad+2

One 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

Hasan IsnaadAl-Albani
Hasan IsnaadMuhammad Muhyi Al-Din Abdul Hamid