Al-Mughirah bin Shubah said: The Messenger of Allah صلی اللہ علیہ وسلم lagged behind (in a journey). He then narrated this story saying: Then we came to people. Abdur-Rahman was leading them in the dawn prayer. When he perceived the presence of the Prophet صلی اللہ علیہ وسلم, he intended to retire. The Prophet صلی اللہ علیہ وسلم asked him to continue and I and the Prophet صلی اللہ علیہ وسلمoffered one rak’ah of prayer behind him. When he had pronounced the salutation, the Prophet صلی اللہ علیہ وسلم got up and offered the rak’ah which had been finished before, and he made no addition to it. Abu Dawud said: Abu Saeed Al-Khudri, Ibn al-Zubair and Ibn Umar hold the opinion that whoever gets an odd number of the rak’ahs of prayer, he should perform two prostrations on account of forgetfulness.