Here are some examples:
* Se dice que la reina es muy rica. (It is said that the queen is very rich.)
* Se dice que va a llover mañana. (They say it's going to rain tomorrow.)
* Se dice que el fantasma de la casa es un pirata. (It is said that the ghost in the house is a pirate.)
Note: "Se dice" is an impersonal construction, meaning it doesn't specify who is saying something.