Sayyiduna Abdullah bin Abbas (may Allah be pleased with them both) said: I heard the Messenger of Allah (peace and blessings be upon him) say: "Whoever has two sons who have died, Allah Almighty will admit him into Paradise." Sayyidah Aishah (may Allah be pleased with her) said: "O Messenger of Allah! Even one?" He (peace and blessings be upon him) said: "Even one, O you who are granted success." Then the Messenger of Allah (peace and blessings be upon him) said: "Whoever of my Ummah has no forerunner, I am the forerunner of the one who has no forerunner; they will not have been afflicted with anything like (the loss of) me."
Hadith Referenceالسنن الكبرى للبيهقي / كتاب الجنائز / 7147