Maliks Muwatta Book 16, Hadith Number 37.

Section : The Prohibition Against Weeping Over the Dead.

Yahya related to me from Malik from Abdullah ibn Abi Bakr from his father that Amra bint Abd ar-Rahman told him that she had heard A’isha, the umm al-muminin, say (when it was mentioned to her that Abdullah ibn Umar used to say, “The dead are tormented by the weeping of the living”), “May Allah forgive Abu Abd ar-Rahman. Of course he has not lied, but he has forgotten, or made a mistake. The Messenger of Allah, may Allah bless him and grant him peace, passed by a jewish woman whose family were crying over her and he said, ‘You are crying over her, and she is being tormented in her grave.'”