Repent of sins salvationism comes from Judaism (which existed in the Old Testament times over 1,000+ years before Catholicism) & its Talmud & Mishneh/Mishnah; they push repent of sins salvationism heresy to have eternal salvation:

"Since free choice is granted to all men as explained, a person should always to do Teshuvah and to confess verbially for his sins, striving to cleanse his hands from sin in order that he may die as a Baal-Teshuvah and merit the life of the world to come.
A man should always consider himself as if he is about to die; he may die when his time is up while behaving sinfully. He should therefore repent of his sins immediately."⚠️
(Talmud, Mishneh 7:1-2 Link Source; 2nd Picture's Link Source is Jewish Encylopedia)

👉Now we know why repent of sins salvationism heresy AND sinless perfectionism heresy (which claims "you cannot sin & yet be saved/go to heaven) are being promoted today by Judaizers & hereticks while the world is being Judaized

ℝ𝕖𝕡𝕖𝕟𝕥𝕒𝕟𝕔𝕖 𝔼𝕩𝕒𝕞𝕚𝕟𝕖𝕕 & 𝕎𝕠𝕣𝕜𝕤-𝔹𝕒𝕤𝕖𝕕 𝕊𝕒𝕝𝕧𝕒𝕥𝕚𝕠𝕟𝕚𝕤𝕥