I heard Ibn ʿAbbas saying, "O people! Listen to what I say to you, and let me hear whatever you say, and don't go (without understanding), and start saying, 'Ibn ʿAbbas said so-and-so, Ibn ʿAbbas said soand- so, Ibn ʿAbbas said so-and-so.' He who wants to perform the Tawaf around the Kaʿba should go behind Al-Hijr (i.e. a portion of the Kaʿba left out unroofed) and do not call it Al-Hatim, for in the pre-Islamic period of ignorance if any man took an oath, he used to throw his whip, shoes or bow in it.  

ابْنُ عَبَّاسٍ مَنْ طَافَ بِالْبَيْتِ فَلْيَطُفْ مِنْ وَرَاءِ الْحِجْرِ وَلاَ تَقُولُوا الْحَطِيمُ فَإِنَّ الرَّجُلَ فِي الْجَاهِلِيَّةِ كَانَ يَحْلِفُ فَيُلْقِي سَوْطَهُ أَوْ نَعْلَهُ أَوْ قَوْسَهُ