A prostitute saw a dog moving around a well on a hot day and hanging out its tongue because of thirst. She drew water for it in her shoe and she was pardoned (for this act of hers). (Using translation from Muslim 2245a)
عَنِ النَّبِيِّ ﷺ أَنَّ امْرَأَةً بَغِيًّا رَأَتْ كَلْبًا فِي يَوْمٍ حَارٍّ يُطِيفُ بِبِئْرٍ قَدْ أَدْلَعَ لِسَانَهُ مِنَ الْعَطَشِ فَنَزَعَتْ لَهُ بِمُوقِهَا فَغُفِرَ لَهَا