Sahih al-Bukhari, Volume 8, Book 73, Hadith 15 (USC-MSA) ⓘ
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 " .
also referenced under: Book 78, Hadith 17 (In-Book) & Hadith 5986 (DarusSalam)