Strong's Concordance G28

Original Word: Ἄγαρ
Transliteration: Ágar
Phonetic Spelling: ag'-ar
[Ἄγαρ] of Hebrew origin (H1904); Hagar, the concubine of Abraham

Usages throughout the bible

Galatians 4:24 - Which things are an allegory: for these are the two covenants; the one from the mount Sinai, which gendereth to bondage, which is Agar. G28

Galatians 4:25 - For this Agar G28 is mount Sinai in Arabia, and answereth to Jerusalem which now is, and is in bondage with her children.