Sunan Ibn Majah
4211
Sahih+3

It was narrated from Abu Bakrah that the Messenger of Allah (ﷺ) said:“There is no sin more deserving that Allah hasten the punishment in this world, in addition to what is stored up for him in the Hereafter – than injustice and severing the ties of kinship.”

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi