i can connect 3 arduinos UNO with the module Zigbe (XbeeS2); one that receives the data and the other two send me
How have you configured the 3 XBees? Be specific. "One that receives and two that send" doesn't mean anything. All XBees are two way devices. They all send and they all receive.
I need an example since only find one of arduino to arduino.
It really depends on how you have configured the XBees, and whether you are using AT mode or API mode (which depends on how you have configured the XBees).