Deuteronomy 4:39
Know therefore this day, and consider it in your heart, that the LORD he is God in heaven above, and on the earth beneath: there is none else.
Torrey's Topical Textbook—AKJV

Deuteronomy 6:4
Hear, O Israel: The LORD our God is one LORD:
Torrey's Topical Textbook—AKJV