Prophetic Commentary on the Qur'an (Tafseer of the Prophet (pbuh))
Bukhari :: Book 6 :: Volume 60 :: Hadith 371
Narrated Anas:
The Prophet said, "The people will be thrown into the (Hell) Fire and it will say: "Are there any more (to come)?' (50.30) till Allah puts His Foot over it and it will say, 'Qati! Qati! (Enough Enough!)'"