Kissing the Black Stone (Hadith No. 1367)
Hadith no. 1365 and 1366 (below) are repeats. Read the post here.
Narrated Ibn Abbas (radiallaahu `anhu):
The Prophet (sallallaahu `alayhi wasallam) said, “As if I were looking at him, a black person with thin legs plucking the stones of the Ka’ba one after another. “
Narrated Abu Huraira (radiallaahu `anhu):
Allah’s Apostle (sallallaahu `alayhi wasallam) said, “DhusSuwaiqatain (the thin legged man) from Ethiopia will demolish the Ka’ba.”
Narrated ‘Abis bin Rabia:
‘Umar (radiallaahu `anhu) came near the Black Stone and kissed it and said “No doubt, I know that you are a stone and can neither benefit anyone nor harm anyone. Had I not seen Allah’s Apostle (sallallaahu `alayhi wasallam) kissing you I would not have kissed you.”
Touching the black stone, kissing it or pointing to it is the first thing that a person does when he wants to circumambulate the Ka’bah (tawaaf), whether he is doing Hajj or ‘Umrah or a voluntary tawaaf. The Prophet SAWS (peace and blessings of Allaah be upon him) kissed it, and his ummah followed him in doing so. If a person is unable to kiss it he should touch it with his hand or with something, and then kiss that thing. If he is unable to do that he should point to it with his hand and say Allaahu akbar. Touching the Stone is one of the things by means of which Allaah erases sins.
More on it here.