The Prostrations of Forgetfulness

''Indeed, many people are greatly ignorant of the rulings of the prostrations of forgetfulness in the prayer. From them, there is he who abandons the prostration of forgetfulness when it is obligatory. From them, there is he who prostrates when he should not. From them, there is he who makes the prostration of forgetfulness before the salam when he was supposed to prostrate after it. From them, there is he who prostrates after the salam when he was supposed to prostrate before it.''