Man Lā Yaḥḍuruh al-Faqīh
Hadith 10124225 - وَ فِي رِوَايَةِ عَبْدِ اَللَّهِ بْنِ اَلْمُغِيرَةِ عَنْ بُرْدٍ قَالَ : قُلْتُ لِأَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ جُعِلْتُ فِدَاكَ إِنَّا نَعْمَلُ بِشَعْرِ اَلْخِنْزِيرِ فَرُبَّمَا نَسِيَ اَلرَّجُلُ فَصَلَّى وَ فِي يَدِهِ مِنْهُ شَيْءٌ فَقَالَ "لاَ يَنْبَغِي أَنْ يُصَلِّيَ وَ فِي يَدِهِ مِنْهُ شَيْءٌ" وَ قَالَ "خُذُوهُ فَاغْسِلُوهُ فَمَا كَانَ لَهُ دَسَمٌ فَلاَ تَعْمَلُوا بِهِ وَ مَا لَمْ يَكُنْ لَهُ دَسَمٌ فَاعْمَلُوا بِهِ وَ اِغْسِلُوا أَيْدِيَكُمْ مِنْهُ".
Hadith.4225 - And in the narration of Abdullah ibn al-Mughirah from Burd, he said:
I said to Abu Abdullah (as): 'May I be your ransom! We work with pig hair, and sometimes a man forgets and prays while having something of it in his hand.'
Imam (as) said: 'It is not proper for him to pray while having something of it in his hand.'
And Imam (as) also said: 'Take it and wash it. If it has grease, do not use it. But if it does not have grease, then you may use it, and wash your hands after handling it.'"