Musannaf Ibn Abi Shaybah

Hazrat Sulaiman bin Buraidah narrates from his father that when the Noble Prophet (peace and blessings be upon him) conquered Makkah, he (peace and blessings be upon him) came to an old grave and sat beside it. He (peace and blessings be upon him) became as if addressing someone, and people sat around him. When he (peace and blessings be upon him) stood up, he was weeping. Hazrat Umar met him, and Hazrat Umar was the boldest among the people in addressing him. Hazrat Umar said: O Messenger of Allah! May my parents be sacrificed for you, what has made you weep? He (peace and blessings be upon him) replied: This is the grave of my noble mother. I asked my Lord for permission to visit it, and I was granted permission. I asked for permission to seek forgiveness for her, but I was not granted it. I remembered her, and my heart was moved with compassion, so I wept. The narrator says that the Prophet (peace and blessings be upon him) was never seen weeping more than he did on that day.