Abdullah bin Salamah said: At the Battle of Siffin I saw Sayyiduna Ammar bin Yasir (may Allah be pleased with him); he was a tall man of wheat complexion, and he had a spear in his hand.
Al-Tabarani recorded it, and its chain is hasan (good).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15584