What is a good Biblical passage or devotional reading that can help my friend out who is going through a hard time?
All the passages/verses below
2 Corinthians 1:3-4
2 Corinthians :12:9
Psalms is a really good section to read especially when people feel like everyone is against them or they feel like they need some direction in their life. Your friend who is going through a hard time, tell him/her to break bread or perhaps go on a fast to get through that hard time and they will need you too for support.
Hope this helps :)