**Leave something behind**: to leave a place without taking something with you:
- We left in a hurry and I must have left my keys behind.
Now I need to include "home" within the idiom! I was wondering whether the sentence below is idiomatic. If no, the. how would you imply the same message in natural English?
- I've left my wallet behind at home.
I'm asking this question because I was faced with many cases in which "behind" had been removed from the construction above. Since that was contrary to the original idiom, I always thought there should be a missing pint here that I do not know about it. That was why I decided to post a new thread here.
Please let me know about it.