Language:
كتاب الأدب
78  
Good Manners and Form (Al-Adab)
(12)
Chapter: Whoever was made wealthy because of keeping good relations with his kith and kin
(12)
باب مَنْ بُسِطَ لَهُ فِي الرِّزْقِ بِصِلَةِ الرَّحِمِ
Sahih al-Bukhari 5986

Narrated Anas bin Malik:

Allah 's Apostle said, "Whoever loves that he be granted more wealth and that his lease of life be prolonged then he should keep good relations with his Kith and kin."

حَدَّثَنَا يَحْيَى بْنُ بُكَيْرٍ، حَدَّثَنَا اللَّيْثُ، عَنْ عُقَيْلٍ، عَنِ ابْنِ شِهَابٍ، قَالَ أَخْبَرَنِي أَنَسُ بْنُ مَالِكٍ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏ "‏ مَنْ أَحَبَّ أَنْ يُبْسَطَ لَهُ فِي رِزْقِهِ، وَيُنْسَأَ لَهُ فِي أَثَرِهِ، فَلْيَصِلْ رَحِمَهُ ‏"‏‏.‏
Reference : Sahih al-Bukhari 5986
In-book reference : Book 78, Hadith 17
USC-MSA web (English) reference : Vol. 8, Book 73, Hadith 15
  (deprecated numbering scheme)