Hadithcore
Sahih al-Bukhari, 4022
sahih

Narrated Qais:

The Badr warriors were given five thousand (Dirhams) each, yearly. `Umar said, "I will surely give them more than what I will give to others."

حَدَّثَنَا إِسْحَاقُ بْنُ إِبْرَاهِيمَ، سَمِعَ مُحَمَّدَ بْنَ فُضَيْلٍ، عَنْ إِسْمَاعِيلَ، عَنْ قَيْسٍ، كَانَ عَطَاءُ الْبَدْرِيِّينَ خَمْسَةَ آلاَفٍ خَمْسَةَ آلاَفٍ‏.‏ وَقَالَ عُمَرُ لأُفَضِّلَنَّهُمْ عَلَى مَنْ بَعْدَهُمْ‏.‏

References2 variants
In-Book Reference
Book 64, Hadith 71
USC-MSA web (English) reference
Vol. 5, Book 59, Hadith 357 (deprecated numbering scheme)