وَ رَوَى مُحَمَّدُ بْنُ مُسْلِمٍ عَنْ أَحَدِهِمَا عَلَيْهِمَا اَلسَّلاَمُ: أَنَّهُ سُئِلَ عَنِ اَلرَّجُلِ يُحْرِمُ فِي اَلثَّوْبِ اَلْوَسِخِ فَقَالَ «لاَ وَ لاَ أَقُولُ إِنَّهُ حَرَامٌ وَ لَكِنْ أَحَبُّ ذَلِكَ إِلَيَّ أَنْ يُطَهِّرَهُ وَ طُهْرُهُ غَسْلُهُ وَ لاَ يَغْسِلُ اَلرَّجُلُ ثَوْبَهُ اَلَّذِي يُحْرِمُ فِيهِ حَتَّى يَحِلَّ وَ إِنْ تَوَسَّخَ إِلاَّ أَنْ تُصِيبَهُ جَنَابَةٌ أَوْ شَيْءٌ فَيَغْسِلَهُ ».
Muhammad ibn Muslim narrated from one of the Imams (a.s) that he was asked about a man entering Ihram in a dirty garment. Imam (a.s) said: "No, and I do not say it is forbidden, but what I prefer is that he purifies it. Its purification is through washing. A man should not wash the garment in which he enters Ihram until he exits Ihram, even if it becomes dirty, unless it is affected by a state of ritual impurity (janabah) or something similar, in which case he may wash it."