Sayyiduna Ubadah bin al-Samit (may Allah be pleased with him) said in the presence of Sayyiduna Mu'awiyah (may Allah be pleased with him): I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever is caused a bodily injury equal to half the blood money and pardons it, that becomes an expiation for half of his misdeeds; and whoever suffers an injury equal to a third or a quarter of the blood money, for him it becomes an expiation for a quarter or a third of his sins." That man said: Did you really hear this from the Messenger of Allah (peace and blessings be upon him)? He said: "By Allah! I heard it from the Messenger of Allah (peace and blessings be upon him)."
Both of these are munqati' (with broken chains).
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 16056