عن النبي صَلّى اللهُ عَلَيْهِ وسَلَّم قال" لَيْسَ الْوَاصِلُ بِالْمُكَافِئِ، وَلَكِنِ الْوَاصِلُ الَّذِي إِذَا قَطَعَتْ رَحِمُهُ وَصَلَهَا "
The Prophet said, "Al-wasil [a considerate, inseperable friend] is not the one who recompenses the good done to him by his relatives, but al-wasil is the one who keeps good relations with those relatives who had severed the bond of kinship with him." (Bukhari, Good Manners and Form (Al-Adab), 15)