Amr bin Shu'ayb narrates from his father, who narrates from his grandfather, that a man struck another man's knee with a horn and wounded it, so he came to the Prophet (peace and blessings be upon him) to take retaliation. He (peace and blessings be upon him) said: "First get well." He came again to demand it, so he (peace and blessings be upon him) granted him retaliation. Then some time later he came and said: O Messenger of Allah (peace and blessings be upon him)! I have become lame. He (peace and blessings be upon him) said: "Did I not forbid you? You disobeyed me; may Allah distance you, and your lameness goes uncompensated." Then he (peace and blessings be upon him) forbade that retaliation be taken (for a wound) until it has healed.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 16115