Jami` at-Tirmidhi 2175

Abdullah bin Khabbab bin Al-Aratt narrated from his father:"The Messenger of Allah (s.a.w) performed Salat, making it long. They said: 'O Messenger of Allah! You have performed Salat (in a manner) which you do not ordinarily perform it.' He said: 'Yes, It was a prayer of hope and fear. In it I asked Allah for three things. He granted me two, and withheld one from me. I asked him that my Ummah not be destroyed by drought. He granted that. I asked him that they not be overcome by enemies from other then them. He granted that. And I asked him that some of them not suffer from the harm of others, and He withheld that