Arabic (Original)
أَخْبَرَنَا أَبُو الْحُسَيْنِ بْنُ الْفَضْلِ الْقَطَّانُ بِبَغْدَادَ أنبأ أَبُو سَهْلِ بْنُ زِيَادٍ الْقَطَّانُ ثنا مُحَمَّدُ بْنُ غَالِبٍ ثنا أَبُو نُعَيْمٍ ثنا سَيْفٌ قَالَ سَمِعْتُ مُجَاهِدًا يَقُولُ أُتِيَ ابْنُ عُمَرَ فِي مَنْزِلِهِ فَقِيلَ لَهُ هَذَا رَسُولُ اللهِ ﷺ قَدْ دَخَلَ الْكَعْبَةَ قَالَ فَأَقْبَلْتُ فَأَجِدُ رَسُولَ اللهِ ﷺ قَدْ خَرَجَ وَأَجِدُ بِلَالًا عَلَى الْبَابِ قَائِمًا فَقُلْتُ يَا بِلَالُ هَلْ صَلَّى رَسُولُ اللهِ ﷺ فِي الْكَعْبَةِ؟ فَقَالَ نَعَمْ فَقُلْتُ أَيْنَ؟ قَالَ بَيْنَ الْأُسْطُوَانَتَيْنِ رَكْعَتَيْنِ ثُمَّ خَرَجَ فَصَلَّى رَكْعَتَيْنِ فِي وَجْهِ الْكَعْبَةِ
English Translation
Mujahid said: Ibn Umar was brought word at his house that the Messenger of Allah (peace be upon him) had entered the Ka'bah. He said: I came and found the Messenger of Allah had already come out, and Bilal was standing at the door. I said: O Bilal, did the Messenger of Allah (peace be upon him) pray in the Ka'bah? He said: Yes. I said: Where? He said: Between the two pillars, two rak'ahs. Then he came out and prayed two rak'ahs facing the Ka'bah.