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-Ridha’ (‘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):
1. The purification (and acceptance) of deeds.
2. Increase in wealth.
3. Repelling misfortunes.
4. Easiness in Reckoning, (in the Hereafter).
5. Prolonging life.
Usul al-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