Sahih al-Bukhari 3912
صحيح البخاري#3912SahihNarrated Ibn `Umar:`Umar bin Al-Khattab fixed a grant of 4000 (Dirhams) for every Early Emigrant (i.e. Muhajir) and fixed a grant of 3500 (Dirhams) only for Ibn `Umar. Somebody said to `Umar, "Ibn `Umar is also one of the Early Emigrants; why do you give him less than four-thousand?" `Umar replied, "His parents took him with them when they migrated, so he was not like the one who had migrated by himself
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: 63:137