The Holy Prophet [s] said: "He who wishes that his sustenance be increased for him and his death day be delayed, then he should pay attention to his kinsfolk."
Bihar-ul-Anwar, vol. 74, p. 89
Imam Ali ibn Musa al-Rida [a] said: "Wealth does not (excessively) accumulate but by having five traits: extreme miserliness, high expectations, overwhelming greed, breaking off ties with one's kindred, and preferring this world to the next."
Bihar-ul-Anwar, vol. 73, p. 138
Imam Muhammad Baqir [a] said: regard for kinship causes (five advantages):
Usul-i-Kafi, vol. 2, p. 150
The Holy Prophet [s] said: "There are three groups who will not (be allowed to) enter Heaven: drinkers of wine, witches, and renouncers of one's kindred."
Al-Khisal, p. 179