Forty Hadith Qudsi Imam Nawawi's Forty Hadith and Forty Hadith Qudsi are widely regarded as the most popular anthology and the best introduction to the study of the Prophet's Sayings in the English language. The hadith summarize the essential teachings of Islam, concentrating on the following areas: affirmation of the doctrine of tawhid and understanding Allah (swt) in all His attributes, the significance of the five pillars of Islam, attainment of virtue, self-sacrifice for the cause of Allah