Abu Hurairah (RAA) narrated that the Messenger of Allah (ﷺ) said:
"He who wishes to have his earnings grow (and be blessed) and his term of life prolonged, he should keep ties with his kin" Related by Al-Bukhari. (RU)
English reference (RU): Book 16, Hadith 1497 (RU)
Arabic reference (RU): Book 16, Hadith 1454 (RU)