Zadhan narrates: Sayyiduna Ali (may Allah be pleased with him) related something, and a man called him a liar. Sayyiduna Ali (may Allah be pleased with him) said to him: If you are lying, I will pray against you. He said: Go ahead. Sayyiduna Ali (may Allah be pleased with him) prayed against him, and after only a short while that man lost his sight.
Al-Tabarani recorded it in al-Mu'jam al-Awsat; its chain contains Ammar al-Hadrami, whom I do not know; the remaining narrators of this report are thiqat (trustworthy).
Hadith Referenceمجمع الزوائد ومنبع الفوائد / كتاب المناقب / 14684