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. (JA)
English reference (JA): Book 16, Hadith 1497 (JA)
Arabic reference (JA): Book 16, Hadith 1454 (JA)