Zayd bin Wahb (may Allah have mercy on him) said: A man saw another man with his wife and killed her. The case was brought to Sayyiduna Umar (may Allah be pleased with him). Some of the slain woman's brothers gave up their share as charity, so Sayyiduna Umar (may Allah be pleased with him) ordered blood money for the rest of them.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 16072