There are eleven things that are Wajib in Salat:
 

( The Pillars of the Salat )

The Pillars (Arkan) of the Salat are five:

1. Intention (Niyyat) 
2. Saying of the Takbiratul Ihram (Allahu Akbar to begin the Salat). 
3. Standing motionless at the time of saying the Takbir, and the standing before going into the state of Ruku'. 
4. Ruku'.
5. Two Sajdahs.