The Eternal Is One

“And you shall love the Lord your God with all your heart, and with all your soul, and with all your might. And these words which I [Moses] teach you shall be upon your heart; and you shall teach them diligently to your children, and shall talk of them when you sit in your house, and when you walk by the way, and when you lie down, and when you rise. And you shall bind them for a sign upon your hand, and they shall be as frontlets between your eyes. And you shall write them upon the doorposts of your house and on your gates.”

Judaism
The Book of Deuteronomy

Wilson, Andrew, editor. World Scripture - a Comparative Anthology of Sacred Texts. Paragon House, 1991, p. 567 [Deuteronomy 6.5-9, The Torah, The Hebrew Bible].