It wasnarrated that Ibn 'Umar said:
"The Messenger of Allah (ﷺ)turned to face the Stone, then he put his lips on it and wept for along time. Then he turned and saw 'Umar bin Khattab weeping. Hesaid:'O 'Umar, this is the place where tears should be shed.'"
English reference: Vol. 4, Book 25, Hadith 2945
Arabic reference: Book 25, Hadith 3058