What does your dream mean if people who have passed on tell you things in your dream to tell others in your family?

It means you were probably thinking about them.

Dreaming about those who have passed away is a normal part of the grief process, which can continue for several years. The subconscious mind may struggle to accept the reality and permanence of death long after the conscious mind understands the facts. Another purpose of such dreams is an assurance that the dead are at peace, so that the dreamer is able to let go and move forward in life. Yet another possibility is an affirmation that the love between the living and departed continues beyond the separation of death. Each individual will have unique emotional needs, and unique dreams to cope with those needs.