Abu Bakrah narrated that the Messenger of Allah (s.a.w) said:
"There is no sin more worthy of Allah hastening the punishment upon its practitioner in the world – along with what is in store for him in the Hereafter – than tyranny and severing the ties of kinship." (Sahih) (IT)
English reference (IT): Vol. 4, Book 11, Hadith 2511 (IT)
Arabic reference (IT): Book 37, Hadith 2700 (IT)