٦ـ عَلِيُّ بْنُ مُحَمَّدٍ عَنْ سَهْلٍ عَمَّنْ ذَكَرَهُ عَنْ يُونُسَ عَنْ بَكَّارِ بْنِ أَبِي بَكْرٍ قَالَ قُلْتُ لأَبِي عَبْدِ الله (عَلَيْهِ الْسَّلام) الرَّجُلُ يَضَعُ الْكُوزَ الَّذِي يَغْرِفُ بِهِ مِنَ الْحُبِّ فِي مَكَانٍ قَذِرٍ ثُمَّ يُدْخِلُهُ الْحُبَّ قَالَ يَصُبُّ مِنَ الْمَاءِ ثَلاَثَةَ أَكُفٍّ ثُمَّ يَدْلُكُ الْكُوزَ. 
6. Ali ibn Muhammad has narrated from Sahl from those whom he has mentioned from Yunus from Bakkar ibn abu Bakr who has said the following: “I once asked abu ‘Abd Allah , about the case of a mug with which one takes water from a large water container but one places it on a dirty place, then immerses it in the large water container. He (the Imam) said, ‘He must pour water on the mug three times and rub it.’” 