Okay kiddo, have you ever heard of a group of people called Banu Hashim? They are actually a big family that lived a long, long time ago in Arabia. This family was very important because they were the descendants of Prophet Muhammad's grandfather, whose name was Hashim. That's why they were called Banu Hashim, which means "the children of Hashim".
This family was really respected in their community because they were known for being very kind-hearted and brave. They helped people who were in need and tried to make things better for everyone.
However, despite all the good they did, some people didn't like them because they thought Banu Hashim had too much power and influence. This led to a time when they were treated very badly and had to suffer a lot.
But the story has a happy ending, because eventually things changed for the better. Banu Hashim became even stronger and more respected than before, and they continued to be a very important part of Islamic history.