Hadith 6:40
Ibn 'Abbas (RAA) narrated that he used to kiss the Black Stone and prostrate himself on it. Related by Al-Hakim and Al-Baihaqi.
وَعَنْ اِبْنِ عَبَّاسٍ رَضِيَ اَللَّهُ عَنْهُمَا: { أَنَّهُ كَانَ يُقَبِّلُ اَلْحَجَرَ اَلْأَسْوَدَ وَيَسْجُدُ عَلَيْهِ } رَوَاهُ اَلْحَاكِمُ مَرْفُوعًا, وَالْبَيْهَقِيُّ مَوْقُوفًا
Original Reference: Bulugh al-Maram 747