Sayyiduna Abdullah bin Amr bin al-As (may Allah be pleased with him) said: A man of Banu Mudlij was given a slave girl, and he had a son by her. He used to make her serve him. When the boy grew up, the man called her one day and said: Do such and such. The boy said: She will not come to you; how long will you treat my mother as a slave girl? The man became angry and threw his sword at him; it struck his leg, the boy bled, and he died. He went with a group of his people to Sayyiduna Umar (may Allah be pleased with him), and Sayyiduna Umar (may Allah be pleased with him) said: "O enemy of yourself! You are the one who killed your son. Had I not heard the Messenger of Allah (peace and blessings be upon him) say, 'A father is not subjected to retaliation for his son,' I would have killed you. Bring his blood money." So he brought 120 or 130 camels. Sayyiduna Umar (may Allah be pleased with him) selected 100 of them and gave them to his (the son's) heirs, and left the father out.
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنايات / 15964