Abu Hurayra reported that the Messenger of Allah, may Allah bless him and grant him peace, said, "One day a man became very thirsty while walking down the road. He came across a well, went down into it, and drank and then climbed out. In front of him he found a dog panting, eating the dust out of thirst. The man said, 'This dog is as thirsty as I was.' He went back down into the well and filled his shoe, putting it into his mouth (in order to climb back up) and then gave the dog water. Therefore Allah thanked him and forgave him." They said, "Messenger of Allah, will we have a reward on account of animals?" He said, "There is a reward on account of every living thing."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ بَيْنَمَا رَجُلٌ يَمْشِي بِطَرِيقٍ اشْتَدَّ بِهِ الْعَطَشُ فَوَجَدَ بِئْرًا فَنَزَلَ فِيهَا فَشَرِبَ ثُمَّ خَرَجَ فَإِذَا كَلْبٌ يَلْهَثُ يَأْكُلُ الثَّرَى مِنَ الْعَطَشِ فَقَالَ الرَّجُلُ لَقَدْ بَلَغَ هَذَا الْكَلْبَ مِنَ الْعَطَشِ مِثْلُ الَّذِي كَانَ بَلَغَنِي فَنَزَلَ الْبِئْرَ فَمَلَأَ خُفَّاهُ ثُمَّ أَمْسَكَهَا بِفِيهِ فَسَقَى الْكَلْبَ فَشَكَرَ اللَّهُ لَهُ فَغَفَرَ لَهُ قَالُوا يَا رَسُولَ اللهِ وَإِنَّ لَنَا فِي الْبَهَائِمِ أَجْرًا؟ قَالَ فِي كُلِّ ذَاتِ كَبِدٍ رَطْبَةٍ أَجْرٌ  

'You did not feed it nor give it water when you imprisoned it nor did you release it and let it eat from the plants of the earth."  

أَنَّ رَسُولَ اللهِ ﷺ قَالَ عُذِّبَتِ امْرَأَةٌ فِي هِرَّةٍ حَبَسَتْهَا حَتَّى مَاتَتْ جُوعًا فَدَخَلَتِ فِيهَا النَّارَ يُقَالُ وَاللَّهُ أَعْلَمُ لاَ أَنْتِ أَطْعَمْتِيهَا وَلاَ سَقِيتِيهَا حِينَ حَبَسْتِيهَا وَلاَ أَنْتِ أَرْسَلْتِيهَا فَأَكَلَتْ مِنْ خَشَاشِ الأَرْضِ  

'Abdullah ibn al-'As reported that the Prophet, may Allah bless him and grant him peace, said, "Show mercy and you will be shown mercy. Forgive and Allah will forgive you. Woe to the vessels that catch words (i.e. the ears). Woe to those who persist and consciously continue in what they are doing."  

عَنِ النَّبِيِّ ﷺ قَالَ ارْحَمُوا تُرْحَمُوا وَاغْفِرُوا يَغْفِرُ اللَّهُ لَكُمْ وَيْلٌ لأَقْمَاعِ الْقَوْلِ وَيْلٌ لِلْمُصِرِّينَ الَّذِينَ يُصِرُّونَ عَلَى مَا فَعَلُوا وَهُمْ يَعْلَمُونَ  

Abu Umama that the Messenger of Allah, may Allah bless him and grant him peace, said, "Anyone who shows mercy, even to an animal meant for slaughtering, will be shown mercy by Allah on the Day of Rising."  

قَالَ رَسُولُ اللهِ ﷺ مَنْ رَحِمَ وَلَوْ ذَبِيحَةً رَحِمَهُ اللَّهُ يَوْمَ الْقِيَامَةِ