In another narration recorded by him, the wording is: Suwayd bin Ghafalah narrates: We met Sayyiduna Ali (may Allah be pleased with him) and he was wearing two garments; this was in winter. We said: Sir, do not be misled about this land of ours, for this land of ours is not like your land. Sayyiduna Ali (may Allah be pleased with him) said: I was someone who felt the cold (or: who felt the cold a great deal). When the Prophet (peace and blessings be upon him) sent me to Khaybar, I submitted: I am suffering from eye inflammation. So the Prophet (peace and blessings be upon him) put his saliva in my eyes, and after that I never felt heat or cold, nor did I ever suffer from eye inflammation.
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 14708