Does a slight movement invalidate the prayer, such as taking one or two steps, or moving the hand, to push away a child or to enable prostration, knowing that excessive movement invalidates the prayer?

A Muslim must approach their prayer and humble themselves in it with their heart and body, for Allah, the Almighty, says: "Successful indeed are the believers those who humbly observe their prayers." They must also be tranquil in it, and excessive, continuous movement invalidates the prayer. However, slight movement for a need, such as ensuring proper prostration or moving a child away, does not invalidate it.