English Translation of Hadith
Hazrat Numan bin Bashir (May Allah be pleased with him) reported: The Messenger of Allah [SAWW](PBUH) said, Verily, there is a piece of flesh in the body, if it is healthy, the whole body is healthy, and if it is corrupt, the whole body is corrupt. Verily, it is the heart.”
[Muslim Book 10, Chapter 41, Hadith # 3882].
Lesson : as mentioned above in Surah Al- Ankabut Ayat 04. “those who do evil deeds think that they can outstrip Allah”, important point underlying this Hadith concerns the heart. Its purity or impurity directly affects the human conduct in a good or bad way. It is, therefore, absolutely necessary to cleanse the heart of all wiles and impurities, and this is not possible without sound Faith and consciousness of Allah.