Al-Adab Al-Mufrad #380

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."