The Blood of Christ: does the Bible anywhere put its saving power in the same category as Christ perfectly keeping the law for believers?

**I ask Reformed Protestants** because at a time of worship with Reformed Protestants two days ago, I heard the preacher twice say that “Christ perfectly kept the law on our behalf”. Once during his prayer, and again during his sermon, making the claim that when believers do sin, Jesus having perfectly kept the law means that we will be pardoned due to that. I have searched the phrase “the blood of Christ” (and what it does for believers), but **nowhere can I find any phrase about Jesus perfectly keeping the O.T. law to ensure forgiveness for their later sins**. I list 12 verses on the blood of Christ to illustrate the importance the Bible gives to it: Acts 20:28; Ephesians 1:7; Colossians 1:14 & 20; Hebrews 9:12 & 14 & 22, & 12:24; 1 Peter 1:19; 1 John 1:7; Revelation 1:5 & 7:14. (Not an exhaustive list.) But nowhere do I read anything about Jesus keeping the law perfectly so that we can have (daily?) sins after conversion ‘covered over’. So, ***can anyone give me any such scriptures***, please? I am concerned in case such an idea implies that the blood of Christ is not entirely sufficient.