Sunan Ibn Majah Book 25, Hadith 63
I heard Ibn ‘Abbas say:
The
Messenger of Allah (ﷺ) said: “This Stone will be brought on the
Day of Resurrection, and it will be given two eyes with which to see,
and a tongue with which to speak, and it will bear witness for those
who touched it in sincerity.”
“I saw the bald forehead of ‘Umar bin Khattab when he kissed the Black Stone and said: ‘I am kissing you, although I know that you are only a stone and you can neither cause harm nor bring benefit. Had I not seen the Messenger of Allah (ﷺ) kissing you, I would not have kissed you.’”
“The Messenger of Allah (ﷺ) turned to face the Stone, then he put his lips on it and wept for a long time. Then he turned and saw ‘Umar bin Khattab weeping. He said: ‘O ‘Umar, this is the place where tears should be shed.’”