Galatians 4:4-6

But when the proper time had fully come, God sent His Son, born of a woman, born subject to [the regulations of] the Law, To purchase the freedom of (to ransom, to redeem, to atone for) those who were subject to the Law, that we might be adopted and have sonship conferred upon us [and be recognized as God's sons]. And because you [really] are [His] sons, God has sent the [Holy] Spirit of His Son into our hearts, crying, Abba (Father)! Father!