Westminster Shorter Catechism

Q37

What benefits do believers receive from Christ at death?

The souls of believers are at their death made perfect in holiness105, and do immediately pass into glory106; and their bodies, being still united in Christ107, do rest in their graves, till the resurrection108.
Doctrine
Ch. XXXII Of the State of Men after Death, and of the Resurrection of the Dead

Scripture Proofs

105
Hebrews 12:23
106
Luke 23:432 Corinthians 5:62 Corinthians 5:8Philippians 1:23
107
1 Thessalonians 4:14
108
Daniel 12:2John 5:28-29Acts 24:15