عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ أَبِي عَبْدِ اللَّهِ عَنْ أَبِيهِ عَنْ خَلَفِ بْنِ حَمَّادٍ عَمَّنْ رَوَاهُ قَالَ بَعَثَ أَبُو عَبْدِ اللَّهِ ( عليه السلام ) ابْنَ أَخِيهِ فِي حَاجَةٍ فَجَاءَ وَ أَبُو عَبْدِ اللَّهِ ( عليه السلام ) قَدِ اطَّلَى بِالنُّورَةِ فَقَالَ لَهُ أَبُو عَبْدِ اللَّهِ ( عليه السلام ) اطَّلِ فَقَالَ إِنَّمَا عَهْدِي بِالنُّورَةِ مُنْذُ ثَلَاثٍ فَقَالَ أَبُو عَبْدِ اللَّهِ ( عليه السلام ) إِنَّ النُّورَةَ طَهُورٌ .
4. A number of our people have narrated from Ahmad ibn abu ‘Abd Allah from his father from Khalaf ibn Hammad from those who narrated to him who has said the following: “Abu ‘Abd Allah , once sent the son of his brother for something he needed. He returned when abu ‘Abd Allah , had applied lime paste. He (the Imam) said, ‘Apply lime paste.’ He said, ‘Only three days ago I had applied it.’ Abu ‘Abd Allah , said, ‘Applying lime is purifying.’” 