It is narrated from Sayyiduna Abdullah bin Mas'ud (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever sends ahead (to the Hereafter) three children who had not yet reached puberty, they will become a strong fortress for him against the Fire." Upon this, Sayyiduna Abu al-Darda' (may Allah be pleased with him) said: "I have sent ahead two children." He (peace and blessings be upon him) said: "And two as well (are the same)." Then Sayyiduna Ubayy bin Ka'b (may Allah be pleased with him), who was the leader of the Qur'an reciters, said: "I have sent ahead one child." He (peace and blessings be upon him) said: "And one as well (is the same), but this reward is when patience is shown at the first shock of the blow."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu Ubaydah except Abu Muhammad, the freed slave of Umar, and al-Awwam bin Hawshab is alone in narrating it."
Hadith Referenceالمعجم الأوسط / باب الميم / 7868
Hadith Takhrij«أخرجه الترمذي فى «جامعه» برقم: 1061، وابن ماجه فى «سننه» برقم: 1606، وأحمد فى «مسنده» برقم: 3624، 4076، 4159، 4158، 4160، 4400، وأبو يعلى فى «مسنده» برقم: 5085، 5116، 5352، والبزار فى «مسنده» برقم: 1728، وابن أبي شيبة فى «مصنفه» برقم: 12007، والطبراني فى «الكبير» برقم: 10240، 10414، والطبراني فى «الأوسط» برقم: 6076»