This is an explanation of the book of Ar-Riqaq from Sahih Al-Bukhari by Dr. Saleh as-Saleh. He depends on the explanation of Sh. Ibn Uthaimin’s explanation. This book is talking about narrations which softening the hearts because it becomes hard by sins. The first hadith in this book says that The Prophet said, "There are two blessings which many people lose: (They are) Health and free time for doing good."