The Messenger of Allah has entered the Kabah." So Ibn Umar said, I (Ibn Umar) came and found that the Messenger of Allah had come out, and I found Bilal standing at the door. I said: "O Bilal, did the Messenger of Allah pray inside the Kabah?' He said: "Ues." I said: "Where>" He said: "Between these two columns, two Rakahs. Then he came out and prayed two Rakahs in front of the Kabah." (Using translation from Nasāʾī 2908)
سَمِعْتُ مُجَاهِدًا يَقُولُ أَذِنَ ابْنُ عُمَرَ فِي مَنْزِلِهِ فَقِيلَ هَذَا رَسُولُ اللهِ ﷺ قَدْ دَخَلَ الْكَعْبَةَ قَالَ فَأَقْبَلْتُ فَأَجِدُ رَسُولَ اللهِ ﷺ قَدْ خَرَجَ وَأَجِدُ بِلَالًا عَلَى الْبَابِ قَائِمًا فَقُلْتُ يَا بِلَالُ صَلَّى رَسُولُ اللهِ ﷺ فِي الْكَعْبَةِ؟ قَالَ نَعَمْ قُلْتُ أَيْنَ؟ قَالَ «مَا بَيْنَ هَاتَيْنِ الْأُسْطُوَانَتَيْنِ رَكْعَتَيْنِ ثُمَّ خَرَجَ فَصَلَّى رَكْعَتَيْنِ فِي وَجْهِ الْكَعْبَةِ»