Muhammad bin Talhah bin Yazid said: A man wounded another man's leg with a horn. He came to the Prophet (peace and blessings be upon him) to take retaliation. He (peace and blessings be upon him) said: "Wait." Then he came again to take retaliation. He (peace and blessings be upon him) again said: "Wait." Then he came a third time, or more, seeking retaliation, so he (peace and blessings be upon him) gave him retaliation. That man's leg healed, while the leg of the one who took retaliation became paralysed. So he came again to demand retaliation, and he (peace and blessings be upon him) said: "Now there is nothing for you. Did I not tell you to wait?"
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 16111