I'm looking for a certain proverb

Question

Someone recently quoted a proverb to me that at the time, didn't make full sense but today, makes total sense and I'm trying to find it but can't.

I don't remember the words exactly but it was on the line of something like

The first persons story is believable until we hear the second persons story. Or something about thinking the first is truth until you hear the rest of the story.

Thank you

Answer 1

I would like to know too