[1/-] al-Kafi: Muhammad b. Abdallah and Muhammad b. Yahya from Abdallah b. Ja’far al-Himyari who said: We gathered – myself and the Shaykh Abu Amr [al-Amri] رحمه الله at Ahmad bin Ishaq’s place. Ahmad b. Ishaq gestured at me to ask him [al-Amri] about the Successor [al-Mahdi] so I said to him: O Aba Amr – I want to ask you something … Abu Ali [Ahmad b. Ishaq] also informed me that he had asked Aba Muhammad [al-Hasan b. Ali al-Askari] عليه السلام about the same matter and he [the Imam] said to him: al-Amri and his son are two trustees. What they give to you on my behalf then their giving is truly on mine behalf, and what they say to you on my behalf then their saying is truly on mine behalf. Therefore listen to them and obey them, for they are both trustworthy and reliable …

[-/1] الكافي: محمد بن عبدالله ومحمد بن يحيى جميعا، عن عبدالله بن جعفر الحميري قال: اجتمعت أنا والشيخ أبوعمرو رحمه الله عند أحمد بن إسحاق فغمزني أحمد بن إسحاق أن أسأله عن الخلف فقلت له: يا أبا عمرو إني اريد أن أسألك عن شئ  … وأخبرني أبوعلي أنه سأل ابا محمد عليه السلام عن مثل ذلك، فقال له: العمري وابنه ثقتان، فما أديا إليك عني فعني يؤديان وما قالا لك فعني يقولان، فاسمع لهما وأطعمها فإنهما الثقتان المأمونان …