The Hebrew word ’ekhad is used to express compound unity when something is made up of smaller units. For instance one bunch of grapes or one married couple (Gen. 1:5; 2:24; Ezra 2:64; Ezek. 37:17). Absolute oneness is expressed with the word yakhid. This name of God is consistent with the idea of the Trinity—three persons in One God.
Three passages speak explicitly of God being one (Deut. 6:4; Zech. 14:9; Mal. 2:10) although some people argue that this is not exactly a name for God.
One of those passages is the Jewish statement of faith, the Shema, found in Deuteronomy 6:4.
Hear, O Israel: The Lord our God is one Lord (Deut. 6:4 KJV)
One God in Hebrew:
Strong’s Concordance numbers: 410, 259
Bible reference: Mal. 2:10
Have we not all one father? hath not one God created us? why do we deal treacherously every man against his brother, by profaning the covenant of our fathers? (Malachi 2:10 KJV)