Musnad Ahmad 830:2

Yahya narrated to us, from 'Uyaynah, he said: My father narrated to me, from Abu Bakrah; and Waki' said: 'Uyaynah narrated to us, and Yazid said: 'Uyaynah informed us, from his father, from Abu Bakrah, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "There is no sin more deserving that Allah should hasten the punishment for its perpetrator in this world, along with what is stored up for him in the Hereafter, than oppression or severing ties of kinship." Waki' said: "That Allah should hasten," and Yazid said: "Allah hastens," and he said: "along with what is stored up for him."