Be compassionate towards animals; do not sell them; offer something else which may be more beneficial instead when you cannot give what is asked for.

The hadith narrated by Abdullah ibn Abbas states that Prophet Muhammad (PBUH) prohibited the sale of dogs. He instructed that if someone comes to ask for its price, they should fill their hand-palm with dust instead. This hadith teaches us that it is not permissible to sell animals such as dogs and other creatures in Islam. It also shows us how merciful and compassionate Prophet Muhammad was towards animals as he did not want them to be sold or mistreated in any way. Furthermore, this hadith also teaches us about being generous and kind towards others even if we cannot give them what they are asking for; instead we should offer something else which may be more beneficial for them in some way or another.