'Umar bin al-Khattab (RAA) narrated, 'I heard the Messenger of Allah say, "A father is not to be killed for his offspring." Related by Ahmad, At-Tirmidhi and Ibn Majah. Ibn al-Garud and al-Baihaqi graded it as Sahih. (ES)
English reference (ES): Book 9, Hadith 1203 (ES)
Arabic reference (ES): Book 9, Hadith 1173 (ES)