Treasury of Scripture Knowledge
And he received the sign of circumcision, a seal of the righteousness of the faith which he had yet being uncircumcised: that he might be the father of all them that believe, though they be not circumcised; that righteousness might be imputed unto them also:
This is my requirement that you and your descendants after you must keep: Every male among you must be circumcised.
The blood will be a sign for you on the houses where you are, so that when I see the blood I will pass over you, and this plague will not fall on you to destroy you when I attack the land of Egypt.
"Tell the Israelites, 'Surely you must keep my Sabbaths, for it is a sign between me and you throughout your generations, that you may know that I am the Lord who sanctifies you.
I also gave them my Sabbaths as a reminder of our relationship, so that they would know that I, the Lord, sanctify them.
For a person is not a Jew who is one outwardly, nor is circumcision something that is outward in the flesh,
The Lord your God will also cleanse your heart and the hearts of your descendants so that you may love him with all your mind and being and so that you may live.
2 Corinthians 1:22
who also sealed us and gave us the Spirit in our hearts as a down payment.
And when you heard the word of truth (the gospel of your salvation) -- when you believed in Christ -- you were marked with the seal of the promised Holy Spirit,
And do not grieve the Holy Spirit of God, by whom you were sealed for the day of redemption.
They were told not to damage the grass of the earth, or any green plant or tree, but only those people who did not have the seal of God on their forehead.
For the promise to Abraham or to his descendants that he would inherit the world was not fulfilled through the law, but through the righteousness that comes by faith.
namely, the righteousness of God through the faithfulness of Jesus Christ for all who believe. For there is no distinction,
What shall we say then? -- that the Gentiles who did not pursue righteousness obtained it, that is, a righteousness that is by faith,
But the righteousness that is by faith says: "Do not say in your heart, 'Who will ascend into heaven?'" (that is, to bring Christ down)
For through the Spirit, by faith, we wait expectantly for the hope of righteousness.
and be found in him, not because I have my own righteousness derived from the law, but because I have the righteousness that comes by way of Christ's faithfulness -- a righteousness from God that is in fact based on Christ's faithfulness.
By faith Noah, when he was warned about things not yet seen, with reverent regard constructed an ark for the deliverance of his family. Through faith he condemned the world and became an heir of the righteousness that comes by faith.
2 Peter 1:1
From Simeon Peter, a slave and apostle of Jesus Christ, to those who through the righteousness of our God and Savior, Jesus Christ, have been granted a faith just as precious as ours.
So even David himself speaks regarding the blessedness of the man to whom God credits righteousness apart from works:
Then I will make you into a great nation, and I will bless you, and I will make your name great, so that you will exemplify divine blessing.
Now Abraham was 99 years old when he was circumcised;
On the eighth day the flesh of his foreskin must be circumcised.
No one after drinking old wine wants the new, for he says, 'The old is good enough.'"
"No one can withhold the water for these people to be baptized, who have received the Holy Spirit just as we did, can he?"
Since God is one, he will justify the circumcised by faith and the uncircumcised through faith.
So then those who believe are blessed along with Abraham the believer.