Thou shalt ... swear by his name. Deuteronomy 6:13, 10:20But when you swear to God, you've got to do what you swore to do and tell the truth.
He that sweareth in the earth shall swear by the God of truth. Isaiah 65:16
Thou shalt swear, The LORD liveth. Jeremiah 4:2
Swear by my name, The LORD liveth. Jeremiah 12:16
Everyone who swears by God will glory.
Ye shall not swear by my name falsely. Leviticus 19:12
When a man shall make a singular vow .... He shall not alter it, nor change it, a good for a bad, or a bad for a good. Leviticus 27:2, 10
If a man vow unto the Lord, or swear an oath to bind his soul with a bond, he shall not break his word; he shall do according to all that proceedeth out of his mouth. Numbers 30:2
When thou shalt vow a vow unto the Lord thy God, thou shalt not slack to pay for it; for the Lord thy God will surely require it of thee; and it would be sin in thee. Deuteronomy 23:21
Every one that sweareth by him shall glory. Psalm 63:11Many of God's favorite people swore to God.
Abraham swore to God.
Now, therefore, swear unto me here by God ... And Abraham said, I will swear. Genesis 21:23-24He even made his servant put his hand under his [Abraham's] thigh while swearing to God.
And Abraham said unto his eldest servant ... Put, I pray thee, thy hand under my thigh: and I will make thee swear by the Lord. Genesis 24:2-3Jacob swore by the fear of this father Issac.
And the servant put his hand under the thigh of Abraham his master, and sware to him concerning that matter. Genesis 24:9
And Jacob sware by the fear of his father Isaac. Genesis 31:53And he made his son Joseph swear to God the old fashioned way: by holding his father's [Jacob's] testicles in his hand while swearing.
And the time drew nigh that Israel [Jacob] must die: and he called his son Joseph, and said unto him, If now I have found grace in thy sight, put, I pray thee, thy hand under my thigh... And he said, Swear unto me. And he sware unto him. And Israel bowed himself upon the bed's head. Genesis 47:29-31Daniel's linen-clothed guy swore to God while walking on water.
I heard the man clothed in linen, which was upon the waters of the river, when he held up his right hand and his left hand unto heaven, and sware by him that liveth for ever that it shall be for a time, times, and an half; and when he shall have accomplished to scatter the power of the holy people, all these things shall be finished. Daniel 12:7The whole house of Jacob swore by the name of the Lord.
O house of Jacob ... which swear by the name of the Lord. Isaiah 48:1An angel in Revelation swore to God.
And the angel ... sware by him that liveth for ever and ever. Rev.10:5-6And sometimes God swears by himself.
The LORD's anger was kindled the same time, and he sware. Numbers 32:10
I [God] have sworn by myself. Isaiah 45:23
He [God] sware to himself. Hebrews 6:13
The Lord sware and will not repent. Hebrews 7:21
But I say unto you, swear not at all; neither by heaven for it is God's throne; nor by the earth for it is his footstool. ... But let your communication be, Yea, yea; Nay, nay: for whatsoever is more than these cometh of evil. Matthew 5:34-37And the author of James condemned swearing "above all things."
But above all things, brethren, swear not, neither by heaven, neither by the earth, neither by any other oath: but let your yea be yea; and your nay, nay; lest ye fall into condemnation. James 5:12