Musnad Ahmad 30:620

'Abd al-Razzaq narrated to us, Malik informed us, from Sumayy, from Abu Salih, from Abu Hurayrah, who said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "If the people knew what is in the call (to prayer) and the first row, they would have cast lots for them. And if they knew what is in arriving early (to the prayer), they would have raced to it. And if they knew what is in the 'Atamah (night prayer) and the Subh (dawn prayer), they would have come to them even if they had to crawl." I said to Malik: "Is it not disliked to say 'al-'Atamah'?" He said: "That is how the one who narrated it to me said it."