Hazrat Hammad bin Farwah narrates that once I performed istinja and forgot to do wudu. Then I offered the Zuhr, Asr, and Maghrib prayers. Later, I remembered that I had performed these prayers without wudu. I asked Hazrat Ata, Hazrat Mujahid, and Hazrat Saeed bin Jubair about this, and all of them said: Perform wudu and repeat all those prayers, and offer the earlier prayer first.