Oaths: The Jews: To Use God's Name Alone In
Source: TTT
Deuteronomy 6:13
Fear the LORD your God, serve Him only, and take your oaths in His name.
Deuteronomy 10:20
You are to fear the LORD your God and serve Him. Hold fast to Him and take your oaths in His name.
Isaiah 65:16
Whoever invokes a blessing in the land will do so by the God of truth, and whoever takes an oath in the land will swear by the God of truth. For the former troubles will be forgotten and hidden from My sight.