I have a friend I call when things get too bad for me (we talk at other times too LOL). But anyway she prays for me and will refer me to specific teachings or verses. And I appreciate it. I also do the same for her when she needs it. She doesn't have a mental illness but that doesn't mean she doesn't also go through difficult times in her life. But our beliefs are pretty much the same and we know it.

You don't really know exactly what your friend believes, but it may not have been a mistake. And possibly the verses could have helped.