David's flesh resting in hope implies postmortem forgiveness and salvation

[Alfred Persson]

[#D]
You will not leave my soul in Sheol, Nor will You allow Your Holy One to see corruption.

9 Therefore my heart is glad, and my glory rejoices; My flesh also will rest in hope.
10 For You will not leave my soul in Sheol, Nor will You allow Your Holy One to see corruption.
11 You will show me the path of life; In Your presence is fullness of joy; At Your right hand are pleasures forevermore. (Ps. 16:9-11 NKJ)

The prophecy refers to Christ. By Holy Spirit Peter says David understood that to be so:

29 “Men and brethren, let me speak freely to you of the patriarch David, that he is both dead and buried, and his tomb is with us to this day.
30 “Therefore, being a prophet, and knowing that God had sworn with an oath to him that of the fruit of his body, according to the flesh, He would raise up the Christ to sit on his throne,
31 “he, foreseeing this, spoke concerning the resurrection of the Christ, that His soul was not left in Hades, nor did His flesh see corruption. (Acts 2:29-31 NKJ)

As God's prophet David understands his future depends upon the coming Messiah, His sacrifice for sin which would cover David's many sins. It was for this reason his flesh could “rest (dwell, inhabit sheol) in hope”, because Christ the “Holy One” wouldn't see corruption, His sacrifice for sin accepted and His body raised up.

David’s flesh "resting in hope” contradicts the theory David hoped for “translation” like Enoch and Elijah---resting in hope of resurrection does not apply to either.

Therefore, postmortem opportunity for salvation exclusive to Jesus Christ is in implicit in David’s confidence he would be forgiven his many sins, and his soul not left in Sheol.

 

[Who Me]

postmortem opportunity for salvation exclusive to Jesus Christ is in implicit in David’s confidence he would be forgiven his many sins, and his soul not left in Sheol.

Depends what you mean by postmortem forgiveness.
David and many O T saints had faith in God, they lived an obedient live as is possible for a sinner to live and yes there sins will be or have been forgiven.
We will have the opportunity to meet them in heaven.

But this does not apply to those who did not live a life of faith.
Those who have not sought God and sought to serve him durring their lives on earth will not have their sins forgiven after their death.

As Hebrews says, man is given to die once and after death comes judgement.
Judgement of did they seek God in live or reject him.

There is no second chance.