And for that the dream was doubled unto Pharaoh twice; it is because the thing is established by God, and God will shortly bring it to pass.  Genesis 41:32 KJV

The double is God’s seal on a matter. 

You shall have double for your trouble.

For your shame ye shall have double; and for confusion they shall rejoice in their portion: therefore in their land they shall possess the double: everlasting joy shall be unto them. Isaiah 61:7 KJV

In Christ the double portion belongs to every true and faithful believer.

Turn you to the strong hold, ye prisoners of hope: even to day do I declare that I will render double unto thee; Zechariah 9:12 KJV

Believe it and receive it today.