Ruling 951 — Prayer (Ṣalāh)

While one is engaged in saying obligatory dhikr in prayers, his body must be still; and based on obligatory precaution, [the same applies] while he is engaged in saying recommended dhikr in prayers. If a person wants to move a little forwards or backwards or move his body a little to the right or left, he must not say any dhikr [at the moment of moving].