Luke 1:47
and my spirit has rejoiced in God, my Savior.
Romans 1:17
For the Gospel reveals how a person can be made right with God. It is through faith [in Jesus], from beginning to end, just as it is written [Hab. 2:4], "The righteous person will [obtain] life by [his] faith [in God]."
Romans 3:21-26
But now [i.e., under the Gospel age], a way of being considered right with God apart from [any] law has been made known. [The writings of] the law [i.e., the Pentateuch] and the prophets bear witness to this.
2 Corinthians 5:21
God considered Christ to be sinful on our behalf, even though He never sinned, so that we could be considered right with God through Him.
Philippians 3:9
and to be found in [fellowship with] Him, not having a righteousness of my own, acquired by observing the law of Moses, but one acquired through believing in Christ. This righteousness, which comes from God, is based on faith.
Philippians 4:4
Rejoice in [fellowship with] the Lord all the time. I will say it again: Rejoice!