Salvation is, has been, and will always be, by faith...
Romans 4:3-15 ESV
[3] For what does the Scripture say? "Abraham believed God, and it was counted to him as righteousness." [4] Now to the one who works, his wages are not counted as a gift but as his due. [5] And to the one who does not work but believes in him who justifies the ungodly, his faith is counted as righteousness, [6] just as David also speaks of the blessing of the one to whom God counts righteousness apart from works: [7] "Blessed are those whose lawless deeds are forgiven, and whose sins are covered; [8] blessed is the man against whom the Lord will not count his sin." [9] Is this blessing then only for the circumcised, or also for the uncircumcised? For we say that faith was counted to Abraham as righteousness. [10] How then was it counted to him? Was it before or after he had been circumcised? It was not after, but before he was circumcised. [11] He received the sign of circumcision as a seal of the righteousness that he had by faith while he was still uncircumcised. The purpose was to make him the father of all who believe without being circumcised, so that righteousness would be counted to them as well, [12] and to make him the father of the circumcised who are not merely circumcised but who also walk in the footsteps of the faith that our father Abraham had before he was circumcised. [13] For the promise to Abraham and his offspring that he would be heir of the world did not come through the law but through the righteousness of faith. [14] For if it is the adherents of the law who are to be the heirs, faith is null and the promise is void. [15] For the law brings wrath, but where there is no law there is no transgression.
Revelation 14:6-7 NKJV
[6] Then I saw another angel flying in the midst of heaven, having the everlasting gospel to preach to those who dwell on the earth-to every nation, tribe, tongue, and people- [7] saying with a loud voice, "Fear God and give glory to Him, for the hour of His judgment has come; and worship Him who made heaven and earth, the sea and springs of water."