Jami` at-Tirmidhi Book 10, Hadith 92
"Indeed the Messenger of Allah cursed the women who visit the graves."
"Abdur-Rahman bin Abi Bakr died in Al-Hubshi" He said: "He was carried to Makkah to be buried there. So when Aishah arrived she went to the grave of Abdur-Rahman bin Abi Bakr and she said: "We were like two drinking companions of Jadhimah for such a long time that they would say: 'They will never part.' So when we were separated it was as if I and Malik - due to the length of unity - never spent a night together."
"The Prophet entered a grave during the night, so a torch was lit for him. He took it (the deceased) in from the direction of the Qiblah, and he said: 'May Allah have mercy upon you, you were often invoking (Allah) by reciting the Qur'an.' And he said: 'Allahu Akbar four times."