Imam Reza (a.s) told Ali ibn Yaq'tayn: “If you promise to do just one thing, I will guarantee three things for you.” He asked what these were. Imam Reza (a.s) said: “I guarantee that you will never experience the heat of iron; you will never get poor; and you will never be imprisoned.” He asked what he should do instead. Imam Reza (a.s) said: “You should always respect any of my friends (of the Holy Household) who comes to you.” Ali ibn Yaq'tayn promised to do so, and Imam Reza (a.s) guaranteed the above three.