Narrated Abu Musa:
The Prophet said, "Whoever takes up arms against us, is not from us."
Vol: 009 Book: 088 Hadith: 192
A Selected Hadith
Narrated Ibn Abbas:
The Prophet used to invoke Allah at the time of distress, saying, "La ilaha illal-lahu al-'Azim, al-Halim, La ilaha illal-lahu Rabbu-s-samawati wal-ard wa Rabbu-l-arsh il-azim,"
Vol: 008 Book: 075 Hadith: 356
A Selected Dua
All greetings of humility are for Allah, and all prayers and goodness. Peace be upon you, O Prophet, and the mercy of Allah and His blessings. Peace be upon us and upon the righteous slaves of Allah. I bear witness that...
-> Read More Info: Al-Bukhari, Muslim 1/301. See also Al-Asqalani, Fathul-Bal 1/13.