Reference: Siyar A’laam an-Nubalaa v14 p36
said:
I have not seen any better prayer than that of Muhammad ibn Nasr. A house fly settled upon his ear, and he did not [even] try to brush it away. And we were amazed at the gracefulness of his prayer, and his concentration and state. He would place his chin upon his chest and then stand upright as if he was an erect piece of wood.
