Al-Kāfi
Hadith 481 5ـ عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ سِنَانٍ عَنْ أَبِي خَالِدٍ الْقَمَّاطِ عَنْ أَبِي الْحَسَنِ الْعَطَّارِ قَالَ سَمِعْتُ أَبَا عَبْدِ الله (عَلَيْهِ السَّلام) يَقُولُ أُشْرِكَ بَيْنَ الاوْصِيَاءِ وَالرُّسُلِ فِي الطَّاعَةِ.
5. A number of our people has narrated from Ahmad ibn Muhammad from Muhammad ibn Sinan from abu Khalid al-Qammat from abu al_hassan al-‘Attar who has said that he heard Imam abu ‘Abdallah (a.s.) saying, “Of the matters common among the successors and the messengers themselves one is that to obey them all is obligatory.”