(As a follow-up to the question,) Suppose there is a group of people, and suppose in this group opinions and ideas of a specific member of the group is always accepted by other members and they obey what he/she says. Is there an idiom/phrase for it?
[...] We had had a special respect for my father in my family and his opinions and ideas were always accepted by other family members and as they put it, [the requested idiom or phrase].
In my native language, we say:
He always says the last word.
(The child is the one I mentioned in my previous question)