Abu al-Muhallab (may Allah have mercy on him) said that a man struck another on the head with a stone, and he lost his hearing, his speech, his intellect and his virility, so Sayyiduna Umar (may Allah be pleased with him) ruled four diyahs for him.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الديات / 16228