Well I knew about Hugh Glass before I knew they were doing a movie. In fact while I was researching him I found out about the movie lol.
In any case in the actual story his friends don't back stab (pun intended somewhat) him really. I mean they do leave him, but they thought he was dead and didn't want to carry his body since they were in Native American territory.
I haven't seen the movie, but I know it's good. It has Leo and Tom Hardy.