Al-Kāfi - Volume 6 > Al-Kohl (The Eye Powder): Antimony
Hadith #11

عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ أَبِي عَبْدِ اللَّهِ عَنِ ابْنِ فَضَّالٍ عَنِ ابْنِ الْقَدَّاحِ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ قَالَ أَمِيرُ الْمُؤْمِنِينَ ( صلوات الله عليه ) مَنِ اكْتَحَلَ فَلْيُوتِرْ وَ مَنْ فَعَلَ فَقَدْ أَحْسَنَ وَ مَنْ لَمْ يَفْعَلْ فَلَا بَأْسَ .

11. A number of our people have narrated from Ahmad ibn abu ‘Abd Allah from ibn Faddal from ibn al-Qaddah who has said the following: “Abu ‘Abd Allah, ‘Alayhi al-Salam, has said that ’Amir al-Mu’minin has said, ‘If one applies eye powder, he must do it once because it is good; and if he did not do so it is not harmful.’”