عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ خَالِدٍ عَنْ مُحَمَّدِ بْنِ عَلِيٍّ عَنْ رَجُلٍ عَنْ سَلَمَةَ بَيَّاعِ الْقَلَانِسِ قَالَ
كُنْتُ عِنْدَ أَبِي جَعْفَرٍ ( عليه السلام ) إِذْ دَخَلَ عَلَيْهِ أَبُو عَبْدِ اللَّهِ ( عليه السلام ) فَقَالَ أَبُو جَعْفَرٍ ( عليه السلام ) يَا بُنَيَّ أَ لَا تُطَهِّرُ قَمِيصَكَ فَذَهَبَ فَظَنَنَّا أَنَّ ثَوْبَهُ قَدْ أَصَابَهُ شَيْءٌ فَرَجَعَ فَقَالَ إِنَّهُ هَكَذَا فَقُلْنَا جَعَلَنَا اللَّهُ فِدَاكَ مَا لِقَمِيصِهِ قَالَ كَانَ قَمِيصُهُ طَوِيلًا وَ أَمَرْتُهُ أَنْ يُقَصِّرَ إِنَّ اللَّهَ عَزَّ وَ جَلَّ يَقُولُ وَ ثِيابَكَ فَطَهِّرْ .
10. A number of our people have narrated from Ahmad ibn Muhammad ibn Khalid from Muhammad ibn Ali from a man from Salmah Bayya’ al-Qalanis who has said the following:
“I once was with abu Ja‘far, when abu ‘Abd Allah 
, came. Abu Ja‘far, said, ‘You must cleanse your shirt.’ He left and we thought his shirt might have come in contact with something unclean. He came back and he (the Imam) said, ‘It just is as it was.’ We then asked saying, ‘We pray to Allah to keep our souls in service for your cause, what is wrong with his shirt?’ He (the Imam) said, ‘His shirt is long and I commanded him to shorten it; because Allah, most Majestic, most Glorious, has said, ‘. . . and cleanse (shorten) your clothes.’ (74:4)”
