hazrat mufti mahmud hasan sb gangohi r.a also spend lots of time ans speacially aitikaf of 1 ramzan in markaz nizamuddin under moulana ilyas r.a also to obeied haz.shaikh zakariya's command 1 book named mufti mahmud hasan sb gangohi r.a ki tabligi taqarir is also famous among older worker of tj a must read book writen by Moulana Fazalur Rahman Azmi (d.b) [shaikhul hadis in darululum aazadwille,sauth africa]. Plz check these links for book [READ] [DOWNLOAD] buy this book in english from HERE SO PLZ CHANGED TITLE OF THREAD WITH 3 HAZRATJII