[Machine] When the Messenger of Allah ﷺ went out to Safa, he returned to the black stone and touched it. This is mentioned in the authentic hadith narrated by Hatim ibn Isma'il from Ja'far.  

أَنَّ رَسُولَ اللهِ ﷺ لَمَّا خَرَجَ إِلَى الصَّفَا عَادَ إِلَى الْحَجَرِ فَاسْتَلَمَهُ وَقَدْ مَضَى ذَلِكَ فِي الْحَدِيثِ الثَّابِتِ عَنْ حَاتِمِ بْنِ إِسْمَاعِيلَ عَنْ جَعْفَرٍ