It was
narrated from Ibn ‘Umar that the Messenger of Allah (ﷺ)
forgot
and said the Taslim after two Rak’ah. A man who was called
Dhul-Yadain said to him:
‘O Messenger of Allah, has the prayer been
shortened or did you forget?’ He said: ‘It has not been shortened
and
I did not forget.’ He said: ‘But you prayed two Rak’ah.’ He
said: ‘Is what
Dhul-Yadain says true?’ They said: ‘Yes.’ So
he went forward and
performed two Rak’ah and said the Salam, then
he prostrated twice for
prostrations of forgetfulness.