The Messenger of Allah ﷺ lagged behind (in a journey). He then narrated this story saying : Then we came to people. ‘Abd al-Rahman was leading them in the dawn prayer. When he perceived the presence of the Prophet ﷺ, he intended to retire. The Prophet ﷺ asked him to continue and I and the Prophet ﷺoffered one rak’ah of prayer behind him. When he had pronounced the salutation, the Prophet ﷺ got up and offered the rak’ah which had been finished before, and he made no addition to it. Abu Dawud said: Abu Sa’id 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.
تَخَلَّفَ رَسُولُ اللَّهِ ﷺ فَذَكَرَ هَذِهِ الْقِصَّةَ قَالَ فَأَتَيْنَا النَّاسَ وَعَبْدُ الرَّحْمَنِ بْنُ عَوْفٍ يُصَلِّي بِهِمُ الصُّبْحَ فَلَمَّا رَأَى النَّبِيَّ ﷺ أَرَادَ أَنْ يَتَأَخَّرَ فَأَوْمَأَ إِلَيْهِ أَنْ يَمْضِيَ قَالَ فَصَلَّيْتُ أَنَا وَالنَّبِيُّ ﷺ خَلْفَهُ رَكْعَةً فَلَمَّا سَلَّمَ قَامَ النَّبِيُّ ﷺ فَصَلَّى الرَّكْعَةَ الَّتِي سُبِقَ بِهَا وَلَمْ يَزِدْ عَلَيْهَا شَيْئًا