For starters :
1. King Solomon, Scripture contains 5 books of him, among all the other wise things he wrote he foremost said - The end of the matter; all has been heard. Fear God and keep his commandments, for this is the whole duty of man. [Pred 12:13]
And yet he fell from grace at the end of his life, so bad the Lord turned against him. [1 Kings chapter 11] No endurance till the end.
2.
1Tim 1:18 This charge I entrust to you, Timothy, my child, in accordance with the prophecies previously made about you, that by them you may wage the good warfare,
1Tim 1:19 holding faith and a good conscience. By rejecting this, some have made shipwreck of their faith,
1Tim 1:20 among whom are Hymenaeus and Alexander, whom I have handed over to Satan that they may learn not to blaspheme.
Jesus -> NOSAS
John -> NOSAS
Paul -> NOSAS
James ->NOSAS
Hebrews -> NOSAS
But feel free to ignore all the warnings.
Joh 3:16 “For God so loved the world, that he gave his only Son, that whoever believes in him should not perish but have eternal life.
The promise.
[Q] - is the promise conditional or not ?