[١/٢٣٨] رجال الكشي: حكى بعض الثقات بنيسابور: أنه خرج لإسحاق بن إسماعيل من أبي محمد عليه السلام توقيع: … و يا إسحاق اقرأ كتابنا على البلالي رضي الله عنه فإنه الثقة المأمون العارف بما يجب عليه، و اقرأه على المحمودي عافاه الله فما أحمدنا له لطاعته …
1. [1/238] Rijal al-Kashshi: One of the Thiqat in Naysabur relayed that: there came out a signed rescript from Abi Muhammad عليه السلام to Ishaq b. Ismail saying: … O Ishaq – read this letter of ours to al-Bilali – may Allah be well pleased with him – for he is the Thiqa and trusted one, the one who recognizes what is incumbent on him, and read it too to al-Mahmudi – may Allah give him health – our praise of him is because of his obedience … 