13 بابُ فِي ذكر مَجْلِسَ الرِّضا عَلَيْهِ السَّلامُ مَعَ...
I dislike questioning him in your session and amongst a group of the Hashemites . The people will regard him as incapable when he debates with me on theology. Incapabilities are not permissible for him.” Al-Ma’mun said, “I have invited you because I know that you are learned (in theology). I have no intentions except for you to silence him in an argument.” Soleiman said, “O Commander of the Faithful! I will do it for you. Just bring us together.
Just sit back and watch.” Then Al-Ma’mun sent someone after Al-Ridha’ (a.s.) and said, “A man from Marwaz who is not equal to you in theology has come and asked for you to come to us. Come here if you do not mind.” The Imam (a.s.) made ablutions and told us to go ahead. Imran As-Sa’ebee was with us. We went until we arrived at Al-Ma’mun’s court. Yasir and Khalid took my hands and led me in.
When I got in and greeted (Al-Ma’mun), he asked, “Where is my brother Abul Hassan whom may the Sublime God maintain?” I said, “When we were coming he was putting on his clothes. He ordered us to go ahead.” Then I added, “O Commander of the Faithful! Your servant Imran is also with me. He is right outside.” He said, “Who is Imran?” I said, “He is the Sabian who became a Muslim because of you.” He said, “Let him in.” Then Imran came in. Al-Ma’mun welcomed him and then told him, “O Imran!
You did not die and join the Hashemites !” Imran said, “O Commander of the Faithful! Praise be to God who honored me by you.” Al-Ma’mun said, “O Imran! This is Soleiman al-Marwazi who is the theologian from Khorasan.” Imran said, “O Commander of the Faithful!