A semicircle after the door of the Kabah (anticlockwise direction of tawaf)
مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عَلِيِّ بْنِ النُّعْمَانِ عَنْ سَيْفِ بْنِ عَمِيرَةَ عَنْ أَبِي بَكْرٍ الْحَضْرَمِيِّ عَنْ أَبِي عَبْدِ اللَّهِ ( عليه السلام ) قَالَ إِنَّ إِسْمَاعِيلَ دَفَنَ أُمَّهُ فِي الْحِجْرِ وَ حَجَّرَ عَلَيْهَا لِئَلَّا يُوطَأَ قَبْرُ أُمِّ إِسْمَاعِيلَ فِي الْحِجْرِ
Muhammad Bin Yahya, from Ahmad Bin Muhammad, from Ali Bin Al Numan, from Sayf Bin Ameyra, from Abu Bakr Al Hazramy,
(It has been narrated) from Abu Abdullah-asws having said: ‘Ismail-as buried his-as mother-as in Al-Hijr, and built a chamber upon it, lest the grave of the mother-as of Ismail-as be trampled upon in Al-Hijr’ (by those who circle the Kaaba)’.[1]
[1] Al Kafi – V 4 – The Book of Hajj Ch 7 H 13