Video from The Bible Explained
"Jesus told His disciples that we went to "wake" Lazarus "out of his sleep" when Lazarus had died and Jesus meant to raise him from the dead. Does this mean that souls do not go to heaven when they die but rather go to a state of non-existent sleep? What do you think?" from video introduction.
“Soul sleep” is a belief that after a person dies, his/her soul “sleeps” until the resurrection and final judgment. The concept of “soul sleep” is not biblical. When the Bible describes a person “sleeping” in relation to death (Luke 8:52; 1 Corinthians 15:6), it does not mean literal sleep. Sleeping is just a way to describe death because a dead body appears to be asleep. The moment we die, we face the judgment of God (Hebrews 9:27). For believers, to be absent from the body is to be present with the Lord (2 Corinthians 5:6-8; Philippians 1:23). For unbelievers, death means everlasting punishment in hell (Luke 16:22-23).
Until the final resurrection, though, there is a temporary heaven—paradise (Luke 23:43; 2 Corinthians 12:4) and a temporary hell—Hades (Revelation 1:18; 20:13-14). As can be clearly seen in Luke 16:19-31, neither in paradise nor in Hades are people sleeping. It could be said, though, that a person’s body is “sleeping” while his soul is in paradise or Hades. At the resurrection, this body is “awakened” and transformed into the everlasting body a person will possess for eternity, whether in heaven or hell. Those who were in paradise will be sent to the new heavens and new earth (Revelation 21:1). Those who were in Hades will be thrown into the lake of fire (Revelation 20:11-15). These are the final, eternal destinations of all people—based entirely on whether or not a person trusted in Jesus Christ for salvation.
Present-day defenders of soul sleep include the Seventh Day Adventist church, Jehovah’s Witnesses, Christadelphians, and others.." from the article: What Does the Bible say about Soul Sleep?