Strong's Concordance G5

Original Word: Ἀββᾶ
Transliteration: Abbâ
Phonetic Spelling: ab-bah'
[Ἀββᾶ] of Chaldee origin (H2); father as a vocative

Usages throughout the bible

Mark 14:36 - And he said, Abba, G5 Father, all things are possible unto thee; take away this cup from me: nevertheless not what I will, but what thou wilt.

Romans 8:15 - For ye have not received the spirit of bondage again to fear; but ye have received the Spirit of adoption, whereby we cry, Abba, G5 Father.

Galatians 4:6 - And because ye are sons, God hath sent forth the Spirit of his Son into your hearts, crying, Abba, G5 Father.