Muwatta' Malik 43-5

Translation

Yahya related to me from Malik from Ibn Shihab from Irak ibn Malik and Sulayman ibn Yasar that a man of the Banu Sad ibn Layth was running a horse and it trod on the finger of a man from the Juhayna tribe. It bled profusely, and he died. Umar ibn al-Khattab said to those against whom the claim was made. "Do you swear by Allah with fifty oaths that he did not die of it?" They refused and stopped themselves from doing it. He said to the others, "Will you take an oath?" They refused, so Umar ibn al-Khattab gave a judgement that the Banu Sad had to pay half the full blood-money. Malik said, "One does not act on this."

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