What is the ruling on performing ablution from a vessel licked by a dog, and praying in clothes that have been touched by something from the dog's interior, and praying on ground that has been touched by something from the dog's interior, along with clarifying the ruling on praying therein intentionally or forgetfully, and the ruling on praying in a room where a dog sleeps?

The contents of a vessel licked by a dog must be poured out, unless the water reaches two qullas (a specific volume), and the vessel must be washed seven times, one of them with earth. Ablution (wudu') from it is not permissible before it is washed. As for the body of the dog and its fur, they do not render the earth or clothing impure according to the Maliki and Hanafi schools and Ibn Taymiyyah. Therefore, prayer performed in clothing or a place touched by it is pure and valid. If the room where the dog sleeps is free from its urine, saliva, and other impurities, then prayer performed in it is valid.