Al-Kāfi

Hadith 1024
brotherhoodrights
أَبُو عَلِيٍّ الْأَشْعَرِيُّ عَنْ مُحَمَّدِ بْنِ عَبْدِ الْجَبَّارِ عَنِ ابْنِ فَضَّالٍ عَنْ ثَعْلَبَةَ بْنِ مَيْمُونٍ عَنْ عَبْدِ الْأَعْلَى مَوْلَى آلِ سَامٍ عَنْ مُعَلَّى بْنِ خُنَيْسٍ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ إِنَّ مِنْ حَقِّ الْمُسْلِمِ الْوَاجِبِ عَلَى أَخِيهِ إِجَابَةَ دَعْوَتِهِ .
5. Abu Ali al-Ash‘ariy has narrated from Muhammad ibn ‘Abd al-Jabbar from ibn Faddal from Tha‘labah ibn Maymun from ‘Abd al-’A‘la’ Mawla Ale Sam from Mu‘alla’ ibn Khunayth who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘It is of the obligatory rights of a Muslim on his brother (in faith) to accept his invitation.’”
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī