Chapter on Rulings on Forgetfulness (Sahw) in Prayer and What Requires Repeating of Prayer

So this does not contradict what we have mentioned regarding the obligation of the two prostrations of forgetfulness (‘sajdatay al-sahw’) upon him, because there is nothing in these two reports stating that he is not required to perform the two prostrations of forgetfulness. Rather, the statement "there is nothing upon him" (‘wa la shay’a ‘alayhi’) may be referring to other matters such as sin, blame, or the like, and not a negation of the prostrations themselves.