The Messenger of Allah ﷺ said, "Whoever wishes for his provision to be expanded and his lifespan to be extended, let him maintain ties with his relatives."
أن رسول الله ﷺ قال: من أحب أن يبسط له في رزقه، وينسأ له في أثره، فليصل رحمه.
Bukhari narrated it in Al-Adab (5986) and Muslim in Al-Birr wa Silah wal-Adab (2557: 21), both through Layth bin Saad, who said, Aqeel bin Khalid told me, who said, Ibn Shihab said, Anas bin Malik told me, and he related it.