vishnu shiva fought in a war for prahladhas son Virochana son balis son banasura

 https://en.wikipedia.org/wiki/Banasura

vishnu shiva fought in a war for prahladhas son balis son banasura as he injured or insulted krishnas grand son when he found him with his daughter.

war started 

krishna cut banasuras hands leaving just 4 hands

later they both got married.