800 صحيح حديث ابْنِ عَبَّاسٍ، قَالَ: طَافَ النَّبِيُّ صَلَّى اللهُ عَلَيْهِ وَسَلَّمَ فِي حَجَّةِ الْوَدَاعِ عَلَى بَعِيرٍ يَسْتَلِمُ الرُّكْنَ بِمِحْجَنٍ
Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated that the Prophet (peace and blessings of Allah be upon him) performed Tawaf on his camel during the Farewell Pilgrimage, and he was touching the Black Stone with a stick and then kissing that stick.
Hadith Referenceاللؤلؤ والمرجان / كتاب الحج / 800
Hadith Gradingمحدثین:«صحیح»
Hadith Takhrij«صحیح، أخرجه البخاري في: 25 كتاب الحج: 58 باب استلام الركن بالمحجن»
Brief Explanation
The opinion of the majority of scholars is that the Black Stone (Hajar al-Aswad) should be kissed by placing the mouth upon it. If this is not possible, then one should touch it with the hand and kiss the hand. If even this is not possible, then one should touch it with a stick and kiss the stick. If this too is not possible, then when passing in front of the Black Stone, one should point towards it with the hands and kiss them. (Raaz)