Sayyidina Ahdullah ibn Masud reported that Allah’s Messenger (SAW) said, “He who is predeceased by three minor children will find them as a strong fort against the Fire.” Abu Dharr (RA) said, “I have been predeceased by two’, so he said, “And by two.” Then, Ubayy ibn Kab (RA) , the chief of the reciters of the Qur’an, said, “I have lost one child ahead of me.” He said, “And one also. But, that is only (if patience is shown) at the first shock.”
[Ahmed4077, Ibn e Majah 1606]