Sahih al-Bukhari 1248
صحيح البخاري#1248SahihNarrated Anas:The Prophet (ﷺ) said, "A Muslim whose three children die before the age of puberty will be granted Paradise by Allah due to his mercy for them
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih al-Bukhari is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 23:11