Jesus said, The Tares (the children of the evil one, or devil) will be gathered by his Angels, and burned in the fire and it shall be in the end of this world, He, the Son of man will send forth his angels to gather out of his kingdom, all things that offend them and cast them into the furnace of fire.
The Righteous shall be left behind they are the good seed that the Son of man has sown.
Zachariah 13:7-9 Also tells of this event when it says that In all the land (earth) 2/3 of the people of God shall be cut off and die and left there or in death, the other third the followers of the Shepherd of God shall be brought thru the fire and refined and purified as gold is purified and they will be the people of God.
They will be left behind in the Kingdom of Heaven for the world will be destroyed, and the Harvest of the souls of man will be at the end of the world.
Matthew 13: 39 &40 says the tares, or evil ones shall be burned and it will be in the end of this world.
John the Baptist tell of this, when he said that He (Jesus) will completely purge (clean) his floor, and gather his crop of wheat or souls and burn the chaff in with unquenchable, or eternal fire.
The parable of the Tares tells you when although only God the Father knows the time.
This is why I believe only the believer's of Christ wil be in Heaven, because he will cut off the 1rst, group and the 3rd group of his children. Christians are the 2nd, group. and the other two are Jewish and Muslims.