٥ـ عَلِيٌّ بِإِسْنَادِهِ قَالَ أَدْنَى السِّوَاكِ أَنْ تَدْلُكَ بِإِصْبَعِكَ.
5. Ali through his chain of narrators has narrated the following: “He (the Imam) , has said, ‘The least for brushing is using one’s fingers as a tooth brush.” 