Sayyidah Aishah (may Allah be pleased with her) said, in the hadith of the Slander (al-Ifk): Safwan bin al-Mu'attal (may Allah be pleased with him) struck Hassan (may Allah be pleased with him) with a sword. Hassan (may Allah be pleased with him) cried out, and people came to seize Safwan (may Allah be pleased with him), and Safwan (may Allah be pleased with him) fled. Hassan (may Allah be pleased with him) came to the Prophet (peace and blessings be upon him) and sought retribution from Safwan (may Allah be pleased with him). The Prophet (peace and blessings be upon him) said to Hassan (may Allah be pleased with him): "Grant me Safwan's retribution as a gift." So he gifted it, and in exchange he (peace and blessings be upon him) gave Hassan (may Allah be pleased with him) a large walled garden of date palms and a slave girl who was Roman, and it is said she was Coptic.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 16057