I liked to enter the House (the Ka'bah) and pray therein. The Messenger of Allah ﷺ caught me by hand and admitted me to al-Hijr. He then said: Pray in al-Hijr when you intend to enter the House (the Ka'bah), for it is a part of the House (the Ka'bah). Your people shortened it when they built the Ka'bah, and they took it out of the House.  

أَنْ أَدْخُلَ الْبَيْتَ فَأُصَلِّيَ فِيهِ فَأَخَذَ رَسُولُ اللَّهِ ﷺ بِيَدِي فَأَدْخَلَنِي فِي الْحِجْرِ فَقَالَ صَلِّي فِي الْحِجْرِ إِذَا أَرَدْتِ دُخُولَ الْبَيْتِ فَإِنَّمَا هُوَ قِطْعَةٌ مِنَ الْبَيْتِ فَإِنَّ قَوْمَكِ اقْتَصَرُوا حِينَ بَنَوُا الْكَعْبَةَ فَأَخْرَجُوهُ مِنَ الْبَيْتِ  

"I wanted to enter the House to perform Salat in it, so the Messenger of Allah took me by the hand and put me in the Hijr, and he said: 'Perform Salat in the Hijri if you want to enter the House. For indeed it is part of the House, but your people considered it insignificant when they built the Ka'bah, so they put it outside the House.'"  

أَنْ أَدْخُلَ الْبَيْتَ فَأُصَلِّيَ فِيهِ فَأَخَذَ رَسُولُ اللَّهِ ﷺ بِيَدِي فَأَدْخَلَنِي الْحِجْرَ فَقَالَ صَلِّي فِي الْحِجْرِ إِنْ أَرَدْتِ دُخُولَ الْبَيْتِ فَإِنَّمَا هُوَ قِطْعَةٌ مِنَ الْبَيْتِ وَلَكِنَّ قَوْمَكِ اسْتَقْصَرُوهُ حِينَ بَنَوُا الْكَعْبَةَ فَأَخْرَجُوهُ مِنَ الْبَيْتِ  

I liked to enter the House (the Ka'bah) and pray therein. The Messenger of Allah ﷺ caught me by hand and admitted me to al-Hijr. He then said: Pray in al-Hijr when you intend to enter the House (the Ka'bah), for it is a part of the House (the Ka'bah). Your people shortened it when they built the Ka'bah, and they took it out of the House. (Using translation from Abū Dāʾūd 2028)  

أَنْ أَدْخُلَ الْبَيْتَ فَأُصَلِّيَ فِيهِ فَأَخَذَ رَسُولُ اللهِ ﷺ بِيَدِي فَأَدْخَلَنِي فِي الْحِجْرِ فَقَالَ لِي صَلِّي فِي الْحِجْرِ إِذَا أَرَدْتِ دُخُولَ الْبَيْتِ فَإِنَّمَا هُوَ قِطْعَةٌمِنَ الْبَيْتِ وَلَكِنَّ قَوْمَكِ اسْتَقْصَرُوا حِينَ بَنَوْا الْكَعْبَةَ فَأَخْرَجُوهُ مِنَ الْبَيْتِ