hadith
3717
۞
Imam Ali (AS) said, The vilest of sins is cutting off ties with near relatives and impiety [with ones parents].
الإمامُ عليٌّ (عَلَيهِ الّسَلامُ) : أقْبَحُ المَعاصي قَطيعَةُ الرَّحِمِ وَ العُقُوقُ