Hadees Related to Injustice (Zulm)

Abdullah Ibne-'Abbas Radiyallahu 'anhuma narrates that Nabi Sallallahu 'alaihi wasallam said: The Shaheed (martyr) will be brought on the Day of Resurrection and made to stand for reckoning.
Then the giver of Sadaqah (charity) will be brought and made to stand for reckoning. Then those people will be brought who suffered many trials and hardships in the world; for them neither the Scale (of
justice) will be established, nor will any Court (of accountability) be established for them. They will be bestowed with such immense rewards from Allah that people who had lived in ease and comfort
would wish that their bodies had been cut with scissors for the reward, it would have bestowed upon them. (Tabarani, Majma-'uz- Zawaid)

Hadees Related to Kalima (Kalma)

Abu Hurairah Radiyallahu 'anhu narrates that Rasulullah Sallallahu 'alaihi wasallam said: He who says La ilaha illallah, it shall benefit him (be a means for his salvation) though before that he may be afflicted by what (Punishment) is to befall him.(Bazzar, Tabarani, Targhlb)