The slave-mother of Ibrahim ibn AbdurRahman ibn Awf asked Umm Salamah, the wife of the Prophet ﷺ: I am a woman having a long border of clothe and I walk in filthy place; (then what should I do?). Umm Salamah replied: The Messenger of Allah ( peace be upon him) said: What comes after it cleanses it. (Using translation from Abū Dāʾūd 383)   

أَنَّهَا سَأَلَتْ أُمَّ سَلَمَةَ زَوْجَ النَّبِيِّ ﷺ فَقَالَتْ إِنِّي امْرَأَةٌ أُطِيلُ ذَيْلِي وَأَمْشِي فِي الْمَكَانِ الْقَذِرِ فَقَالَتْ أُمُّ سَلَمَةَ قَالَ رَسُولُ اللهِ ﷺ يُطَهِّرُهُ مَا بَعْدَهُ وَرُوِيَ ذَلِكَ أَيْضًا عَنْ أَبِي هُرَيْرَةَ مَرْفُوعًا وَلَيْسَ بِالْقَوِيِّ  

It was said: "O Messenger of Allah, we want to come to the mosque, but the path that we walk upon is impure." The Messenger of Allah said: "Some parts of the earth purify others." (Using translation from Ibn Mājah 532)   

قُلْنَا يَا رَسُولَ إِنَّا نُرِيدُ الْمَسْجِدَ فَنَطَأُ الطَّرِيقَ النَّجِسَةَ فَقَالَ النَّبِيُّ ﷺ الطُّرُقُ تُطَهِّرُ بَعْضُهَا بَعْضًا وَهَذَا إِسْنَادٌ لَيْسَ بِالْقَوِيِّ