Okay, so imagine you and your friends are all playing together in a big playground. One day, a really kind person comes up to you and your friends and says "Hey, I promise that all of you will get to eat ice cream later!"
This is kind of like what happened with the Prophet Muhammad, who was a really important person in the religion of Islam. He told his followers that there were ten people who were promised to go to paradise, which is like the ultimate playground where everyone is happy forever.
The ten people who were promised paradise were all very special and did very good things in their lives. One of them was the Prophet Muhammad's close companion, Abu Bakr, and another was his husband's daughter, Fatimah.
So the hadith of the ten promised paradise is kind of like a reminder to people that if they do good things and try to be kind, they too can one day go to paradise and be happy forever, just like those ten special people.