Galatians
King James Version (KJV)

“And because ye are sons, God hath sent forth the Spirit of his Son into your hearts, crying, Abba, Father.”
King James Version (KJV)
4:6 And because ye - Gentiles who believe, are also thus made his adult sons, God hath sent forth the Spirit of his Son into your hearts likewise, crying, Abba, Father - Enabling you to call upon God both with the confidence, and the tempers, of dutiful children. The Hebrew and Greek word are joined together, to express the joint cry of the Jews and gentiles.
Ga 4:6 Because ye are sons, God hath sent forth the Spirit. The spirit is bestowed not to make us sons, but because we have become sons by the faith. See Joh 1:12. Crying, Abba, Father. See PNT "Ro 8:15". "Abba" is simply the Syriac for "father". It is found also in Mr 14:36 Ro 8:15. This spirit of adoption helps the son to realize that he is a son, and to look up to God and to address him, if a Semitic, as "Abba"; if a Greek as "Pater"; is an Anglo-Saxon, as "Father".