Dawud As-Sarmi related: My master Imam Al-Hadi (A.S.) ordered me to do many actions then he tested whether I had retained them all. When he noticed that I could not maintain them all, he took a pen and wrote down.
“In the Name of Allah the Beneficent the Merciful. I will remember it, Insha’Allah. All the matters are in Allah’s hand
” I smiled and the Holy Imam(A.S.) asked me about the reason. I said, “Allah make me your sacrifice, this record reminds me of the report that one of our acquaintances related to me on the authority of your grandfather Imam Reza(A.S.). He said that whenever the Imam (A.S.) ordered of a matter, he used to write down: “In the Name of Allah the Beneficent the Merciful. I will remember it, Insha’Allah.”
The Holy Imam(A.S.) said: O Dawud, I am honest to tell you that the neglector of the Bismillah is as same of the neglector of the (obligatory) prayers.