In other words, Paul doesn't say the words "born again", or you'd've quoted it.
Now, Romans 10:13 and Acts 2:21 both quote from this:
Joel 2:28 And it shall come to pass afterward, that I will pour out of My Spirit upon all flesh; and your sons and your daughters shall prophesy, and your old men shall dream dreams, and your young men shall see visions. 29 And on My servants and on my handmaids in those days will I pour out of My Spirit. 30 And I will shew wonders in heaven, and upon the earth, blood, and fire, and vapor of smoke. 31 The sun shall be turned into darkness, and the moon into blood, before the great and glorious day of the Lord come. 32 And it shall come to pass that whosoever shall call on the name of the Lord shall be saved: for in mount Sion and in Jerusalem shall the saved one be as the Lord has said, and they that have glad tidings preached to them, whom the Lord has called.LXX
Romans 4:5 But to him that worketh not, but believeth on him that justifieth the ungodly, his faith is counted for righteousness.
Two very different gospels...
Galatians 2:7-9 Galatians 1:6 Galatians 3:2 John 14:15-17
Galatians 1:6 I marvel that ye are so soon removed from him that called you into the grace of Christ unto another gospel:
Galatians 2:7 But contrariwise, when they saw that the gospel of the uncircumcision was committed unto me, as [the gospel] of the circumcision [was] unto Peter;
Galatians 3:2 This only would I learn of you, Received ye the Spirit by the works of the law, or by the hearing of faith?
John 14:15 If ye love Me, keep My commandments. 16 And I will pray the Father, and He shall give you another Comforter, that He may abide with you for ever; 17 [Even] the Spirit of truth; whom the world cannot receive, because it seeth Him not, neither knoweth him: but ye know Him; for he dwelleth with you, and shall be in you.
Was there another gospel where the Holy Spirit is given by the works of law?