Sayyiduna Ammar bin Yasir (may Allah be pleased with him) said: Once the Prophet (peace and blessings be upon him) was lying with his head in the lap of Sayyiduna Ammar (may Allah be pleased with him). Meanwhile a man came in and asked: What are the polytheists saying about him now? He meant Sayyiduna Ammar (may Allah be pleased with him). The Prophet (peace and blessings be upon him) took his blessed hand behind him, placed it on the back of Sayyiduna Ammar (may Allah be pleased with him) and encircled him with his arm, while his head (peace and blessings be upon him) was in his lap at that time. He (peace and blessings be upon him) said: "These people are going to dye a pure hide red (that is, with blood)."
Al-Tabarani recorded it; its chain contains Ya'qub bin Humayd bin Kasib, who has been declared both trustworthy and weak, and the rest of its narrators are the narrators of the Sahih.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 15593