# Therefore will I give him his portion among the multitudes, and he will divide the plunder with the many

"Portion" and "plunder" refer to what a king rewards his army with after a battle. This means God will greatly honor his servant because of his sacrifice. 

# the multitudes

Many versions interpret this expression as "the many" or "the strong."

# because he exposed himself to death

"he willingly accepted the possibility of death" 

# was numbered with the transgressors

"allowed people to treat him as a criminal"