Answer
(Fatwa: 1081/1019=D/1429)
It is not mentioned in any Hadith that if you have a lot of hair you are fortunate. It might be a saying of any Hakim based on some experiment. It has nothing to do with the beliefs and it is not correct to have such belief. It is proved by the Prophet (صلى الله عليه وسلم) to cut the hair below navel and of armpit as well as moustache. Besides this, there is no proof of cutting hair of other parts of the body. What you have heard is wrong. If there is a special need or reason to cut the hair of the body, then it is allowable but it is better to avoid cutting with no reason. قال فى الشامى: فى حلق شعر الصدر و الظهر ترك الأدب كذا فى القنية
Allah (Subhana Wa Ta’ala) knows Best
Darul Ifta,
Darul Uloom Deoband