Musnad Abu Ya'la al-Mawsili 150:254

Yahya ibn Ayyub narrated to us, Isma'il ibn Ja'far narrated to us, Sharik ibn Abi Namir informed me, from 'Ata' ibn Yasar, from 'Aisha, that she said: Whenever it was her night with the Messenger of Allah (may Allah bless him and grant him peace), he would go out at the end of the night to al-Baqi'. He would say: "Peace be upon you, abode of a believing people. That which you were promised has come to you, deferred until tomorrow, and we, if Allah wills, will join you. O Allah, forgive the people of Baqi' al-Gharqad."