Musnad Ahmad 31:558

Ibrahim narrated to us, Rabah narrated to us, from Ma’mar, from Qatadah regarding His saying: {And We will remove whatever is in their breasts of resentment} [Al-A’raf: 43]. He said: Abu al-Mutawakkil narrated to us, from Abu Sa’id al-Khudri, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "The believers will be saved from the Fire, then they will be detained upon a bridge between Paradise and the Fire, and retribution will be taken for some of them from others."