Hadees related to Imaan

Abu Hurairah R.A narrates that Rasulullah Sallallahu 'alaihi wasallam said: Iman(faith) has more than seventy branches;  the superiormost one is saying of La ilaha illALLAH (There is none worthy of worship except ALLAH); and the inferior most is the removal of an obstacle from the way; and Haya is a branch of Iman.(Sahih-muslim)  

Note: The essence of Haya is that it restrains a man from evil and prevents a man from neglecting the obligations that he owes to others.(Riyad-us-Salihin)