وَحَدَّثَنِي عَنْ مَالِكٍ، أَنَّهُ سَمِعَ ابْنَ شِهَابٍ، يَقُولُ سَمِعْتُ بَعْضَ، عُلَمَائِنَا يَقُولُ مَا حُجِرَ الْحِجْرُ فَطَافَ النَّاسُ مِنْ وَرَائِهِ إِلاَّ إِرَادَةَ أَنْ يَسْتَوْعِبَ النَّاسُ الطَّوَافَ بِالْبَيْتِ كُلِّهِ ‏.‏

Yahya related to me from Malik that he heard Ibn Shihab say thathe had heard one of the people of knowledge say that the Hijr was onlyenclosed so that people would go beyond it as they were making tawaf,and their tawaf would therefore encompass the original House. Translation Not Available

Book Ref: Muwatta Imam Malik Book 20 Hadith 810
Web Ref:  Muwatta Imam Malik Book 20 Hadith 107