There are several different connotations of "saved" in scripture:
The Messiah spoke about being "saved" as deliverance from the bondage to sin.
The Israelites understood being "saved" as deliverance from bondage to their enemies; those nations who were oppressing them.
John was given a vision about being "saved" from bondage to death in the book of Revelation (along with other things but just making a note of saved in this context).
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Upon confession of faith in the Messiah, one is saved from the bondage of sin...which is called a gift.
...and when the Messiah returns He will regather Israel and save them from their enemies of the nations...which is called a promise.
...but absolutely no one has been saved from the bondage to death yet, not until the transformation. So there is a final "salvation" believers await; deliverance from these mortal bodies. As scripture says, the LAST enemy is death.
Believers die every single day as they look forward to receiving glorified bodies that can never die...which is called a reward (not a gift nor a promise).
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Rewards come from putting in work to earn it, and as every New Testament writer explains our good work is obedience. One's reward (eternal life = immortal body) is assured AS LONG AS one continues in obedience. Many will stumble, and for those times we have confession, mercy, and the grace to do better next time (as long as our heart is in the right place).
But if ever one willingly chooses to forsake obedience, grieving the Holy Spirit and counting the blood & sacrifice of the Messiah as an insignificant thing - after KNOWING the truth - they will lose their reward. They will not be saved (from death). These will be those who will weep and gnash their teeth in outer darkness while they see the magnificent city of light as the Almighty and the Messiah dwells with glorified people, while they are unable to get in along with the rest of those who were disobedient and sinful.