In John 17, Jesus clearly states in V. 6 "I have revealed you to those whom you gave me out of the world", then in v. 9 I pray for them, i am not praying for the world, but for those you have given me, for they are yours"
Jesus died for those and only those that His Father had elected to salvation. There are many other scripture veres that support election, Ephesians 1, Romans 9