Ibn 'Abbaas Radiyallahu 'Anhu said:
"Rasulullah Sallallahu 'Alayhi Wasallam said: 'The person that loses two infants, then Allah in return will surely grant that person entrance into Jannah!'. 'Aayeshah Radiyallahu 'Anha asked: 'The one who has lost only one infant from among your ummah?' He replied: 'The one that loses only one infant shall also be forgiven'. 'Aayeshah Radiyallahu 'Anha then inquired: 'What of those who have not lost any children from among your ummah?' He replied: 'I shall be an asset for him in the hereafter, because the loss due to my death shall be felt more than one's family and children'".
English reference: Book 53, Hadith 381
Arabic reference: Book 54, Hadith 398