Musnad Ahmad 937:276

Zayd ibn al-Hubab narrated to us, Mu'awiyah ibn Salih narrated to us, Abu al-Zahiriyah narrated to me, from Jubayr ibn Nufayr, from Abu Dharr, who said: We stood with the Messenger of Allah, peace and blessings of Allah be upon him, on the night of the twenty-third of the month of Ramadan, until the first third of the night. Then he said: "I do not think what you are seeking is anything but behind you." Then we stood with him on the night of the twenty-fifth until the middle of the night. Then he said: "I do not think what you are seeking is anything but behind you." Then we stood with him on the night of the twenty-seventh until it became morning, and he remained silent.