They all got saved while Jesus was preaching the gospel to them in Abraham's bosom and became saints!
Read in the Gospels that when Jesus was raised from the dead all the old testament believers came up out of the grave with Him.... all these folks got born again when Jesus was in hell preaching to the spirits in hell (1 Peter 3:19).
Matthew 27:52,53
And the graves were opened; and many bodies of the saints which slept arose,
And came out of the graves after his resurrection, and went into the holy city, and appeared unto many.
The old testament saints were in Abraham's bosom (see Jesus' teaching about the rich man and Lazarus) which was where paradise was located and where old testament believers went before the new birth was made available by Jesus work on the Cross and His resurrection
This is all kinda freaky so most preachers never talk about this in church... they may not get as many offerings if they freak folks out!
View attachment 37903