Abdullah bin Abbas reported,

He said to him and to Ali bin Abdullah, "Go to Abu Saeed and listen to his hadith."So we went to him while he and his brother were in a garden of theirs watering it. When he saw us, he came over, wrapped his garment around his knees, and sat down. He said, "We were carrying the bricks of the mosque, one brick at a time, while Ammar was carrying two bricks at a time. The Prophet ﷺ passed by him, wiped the dust off his head, and said, 'Alas for Ammar! A rebellious group will kill him. Ammar will be calling them to Allah, and they will be calling him to the Fire.'"

Bukhari 2812

Sahih

حدثنا إبراهيم بن موسى أخبرنا عبد الوهاب حدثنا خالد عن عكرمة أن

ابن عباس قال

له ولعلي بن عبد الله ائتيا أبا سعيد فاسمعا من حديثه فأتيناه وهو وأخوه في حائط لهما يسقيانه فلما رآنا جاء فاحتبى وجلس فقال كنا ننقل لبن المسجد لبنة لبنة وكان عمار ينقل لبنتين لبنتين فمر به النبي ﷺ ومسح عن رأسه الغبار وقال ويح عمار تقتله الفئة الباغية عمار يدعوهم إلى الله ويدعونه إلى النار

البخاري 2812صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Bukhari
Book
Jihad and expeditions
Chapter
Wiping dust off people in the way of Allah
Numbering
Darussalam 2812
Bukhari 2812