✅Answer: Please pay attention to the following narrations:

1 عَنْ سَعْدِ بْنِ عَبْدِ اللَّهِ عَنِ الْمُنَبِّهِ بْنِ عَبْدِ اللَّهِ عَنِ الْحُسَيْنِ بْنِ عُلْوَانَ الْكَلْبِيِّ عَنْ عَمْرِو بْنِ خَالِدٍ عَنْ زَيْدِ بْنِ عَلِيٍّ عَنْ أَبِيهِ عَنْ جَدِّهِ عَنْ عَلِيٍّ قَالَ: سَأَلْتُ رَسُولَ اللَّهِ عَنِ الْجُنُبِ وَ الْحَائِضِ يَعْرَقَانِ فِي الثَّوْبِ حَتَّى يَلْصَقَ عَلَيْهِمَا فَقَالَ إِنَّ الْحَيْضَ وَ الْجَنَابَةَ حَيْثُ جَعَلَهُمَا اللَّهُ عَزَّ وَ جَلَّ لَيْسَ فِي الْعَرَقِ فَلَا يَغْسِلَانِ ثَوْبَهُمَا.

📚 Al-Tahdhib, Volume 1, page 269

Ali (peace be upon him) said: 'I asked the Messenger of Allah (peace be upon him) about a person in a state of major ritual impurity (junub) and a menstruating woman who sweat in their clothes to the point that the clothes stick to them.'

He said: 'Indeed, menstruation and major ritual impurity are in the place that Allah, the Mighty and Exalted, has placed them, and they are not in the sweat, and these two do not need to wash their clothes (there is no need to wash them).'

2 عَنْ مُحَمَّدِ بْنِ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ ابْنِ مَحْبُوبٍ عَنْ هِشَامِ بْنِ سَالِمٍ عَنْ سَوْرَةَ بْنِ كُلَيْبٍ قَالَ: سَأَلْتُ أَبَا عَبْدِ اللَّه عَنِ الْمَرْأَةِ الْحَائِضِ أَ تَغْسِلُ ثِيَابَهَا الَّتِي لَبِسَتْهَا فِي طَمْثِهَا قَالَ تَغْسِلُ مَا أَصَابَ ثِيَابَهَا مِنَ الدَّمِ وَ تَدَعُ مَا سِوَى ذَلِكَ قُلْتُ لَهُ وَ قَدْ عَرِقَتْ فِيهَا قَالَ إِنَّ الْعَرَقَ لَيْسَ مِنَ الْحَيْضِ

📚 Al-Kafi, Volume 3, page 109

Surah ibn Kulayb said: 'I asked Imam Sadiq (peace be upon him) about a menstruating woman: Should she wash the clothes she wore during menstruation?'

The Imam said: 'She washes the places that the blood has reached, and leaves the rest.' I said to him: 'Even if she has sweated in them?' He said: 'Sweat is not from menstruation!'

3 عَنْ سَعْدِ بْنِ عَبْدِ اللَّهِ عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنِ الْعَبَّاسِ بْنِ مَعْرُوفٍ عَنْ عَلِيِّ بْنِ مَهْزِيَارَ عَنْ حَمَّادِ بْنِ عِيسَى وَ فَضَالَةَ بْنِ أَيُّوبَ عَنْ مُعَاوِيَةَ بْنِ عَمَّارٍ قَالَ: سَأَلْتُ أَبَا عَبْدِ اللَّهِ عَنِ الْحَائِضِ تَعْرَقُ فِي ثِيَابِهَا أَ تُصَلِّي فِيهَا قَبْلَ أَنْ تَغْسِلَهَا قَالَ نَعَمْ لَا بَأْسَ.

📚 Al-Tahdhib, Volume 1, page 269

Mu'awiyah ibn Ammar said: 'I asked Imam Sadiq (peace be upon him) about a menstruating woman who sweats in her clothes: Can she pray in her clothes before washing them?' The Imam said: 'Yes, there is no problem!'

✅In the above narrations and similar ones, it is clear that the sweat of a menstruating woman does not need to be washed and is not among the impurities. One can pray in clothes that have the sweat of a menstruating woman unless menstrual blood has reached them.

اللَّهُمَّ فَصَلِّ عَلَی مُحَمَّدٍ وَ آلِ مُحَمَّدٍ وَ عَجِّلْ لِوَلِیِّکَ الْفَرَجَ وَ الْعَافِیَةَ وَ النَّصْرَ