Deuteronomy 5-7 (The Daily Walk Bible).
From Nelson’s New Illustrated Bible Dictionary: SHEMA, THE — the Jewish confession of faith that begins, “Hear, O Israel: The Lord our God, the LORD is one!” (Deut. 6:4). The complete Shema is found in three passages from the Old Testament: Numbers 15:37–41, Deuteronomy 6:4–9 and 11:13–21. The first of these passages stresses the unity of God and the importance of loving Him and valuing His commands. The second passage promises blessing or punishment according to a person’s obedience of God’s will. The third passage commands that a fringe be worn on the edge of one’s garments as a continual reminder of God’s laws. These verses make up one of the most ancient features of worship among the Jewish people. Jesus quoted from the Shema during a dispute with the scribes (Mark 12:28–30).
Mark 12:28-30 “And one of the scribes came up and heard them disputing with one another, and seeing that he answered them well, asked him, ‘Which commandment is the most important of all?’ Jesus answered, ‘The most important is, “Hear, O Israel: The Lord our God, the Lord is one. And you shall love the Lord your God with all your heart and with all your soul and with all your mind and with all your strength.”‘”
The closest the Christian church can come to a universal confession of faith may be the Apostle’s Creed:
I believe in God, the Father almighty,
creator of heaven and earth.
I believe in Jesus Christ, his only Son, our Lord,
who was conceived by the Holy Spirit
and born of the virgin Mary.
He suffered under Pontius Pilate,
was crucified, died, and was buried;
he descended to the dead.
The third day he rose again from the dead.
He ascended to heaven
and is seated at the right hand of God the Father almighty.
From there he will come to judge the living and the dead.
I believe in the Holy Spirit,
the holy catholic church,
the communion of saints,
the forgiveness of sins,
the resurrection of the body,
and the life everlasting. Amen.