The Messenger of Allah ﷺ said, "There is no sin more deserving that Allah hasten its punishment in this world, along with what He stores up for its perpetrator in the Hereafter, than transgression and severing ties of kinship."He said, this is a hasan sahih hadith.
حدثنا علي بن حجر أخبرنا إسمعيل بن إبراهيم عن عيينة بن عبد الرحمن عن أبيه
قال رسول الله ﷺ ما من ذنب أجدر أن يعجل الله لصاحبه العقوبة في الدنيا مع ما يدخر له في الآخرة من البغي وقطيعة الرحم قال هذا حديث حسن صحيح
Its isnad is sahih. Abu Dawud narrated it in the Book of Manners, Chapter on the Prohibition of Transgression, no. 4902, and Ibn Majah, no. 4211, from the hadith of Ismail bin Ibrahim, with the same wording. Ibn Hibban graded it sahih, no. 2039, 2040, as did Hakim, 2/356, 4/162, 163, and Dhahabi agreed with him.