"Kabshah bint Ka'b bin Malik - she was (married) with Ibn Abi Qatadah - narrated "That Abu Qatadah visited her, [so she said:] 'So I poured water for him to use for Wudu.' She said: 'A cat came to drink, so he lowered he container until it drank.' Kabshah said: 'So he saw me looking at it and said, "O my niece! Are you surprised at that?" So I said yes. He said: "Indeed Messenger of Allah said 'It is not impure, it is only one of those roam around among you.'"  

وَكَانَتْ عِنْدَ ابْنِ أَبِي قَتَادَةَ أَنَّ أَبَا قَتَادَةَ دَخَلَ عَلَيْهَا قَالَتْ: فَسَكَبْتُ لَهُ وَضُوءًا۔ قَالَتْ: فَجَاءَتْ هِرَّةٌ تَشْرَبُ، فَأَصْغَى لَهَا الإِنَاءَ حَتَّى شَرِبَتْ۔ قَالَتْ كَبْشَةُ: فَرَآنِي أَنْظُرُ إِلَيْهِ فَقَالَ: أَتَعْجَبِينَ يَا بِنْتَ أَخِي؟ فَقُلْتُ: نَعَمْ۔ قَالَ: إِنَّ رَسُولَ اللَّهِ ﷺ قَالَ: «إِنَّهَا لَيْسَتْ بِنَجَسٍ إِنَّمَا هِيَ مِنَ الطَّوَّافِينَ عَلَيْكُمْ أَوِ الطَّوَّافَاتِ۔»