Amash, I do not think he reported it except as a marfu hadith, said, "Woe to the Arabs from a matter that has drawn near. Successful is the one who restrains his hand." Abu Muawiya agreed with him, narrating it from Abu Hurairah.
حدثنا محمد بن عبيد قال حدثنا الأعمش عن أبي صالح
الأعمش لا أراه إلا قد رفعه قال ويل للعرب من أمر قد اقترب أفلح من كف يده ووافقه أبو معاوية عن أبي هريرة
Its chain of transmission is sahih. It has already appeared at 9049 in print T. His words, "he withheld his hand," mean during the strife.