Most Relevant Verses
But above all [things], my brethren, do not swear, either by heaven or by earth or by any other oath; but let your yes be [a simple] yes, and your no be [a simple] no, so that you may not sin and fall under condemnation.
Topics on Swearing Oaths
But I tell you, Do not bind yourselves by an oath at all: either by heaven, for it is the throne of God;
They have spoken mere words of the lips, swearing falsely in making covenants; therefore judgment springs up like hemlock [or other poisonous plants] in the furrows of the field.
More Verses on Swearing Oaths
And Abraham said to the eldest servant of his house [Eliezer of Damascus], who ruled over all that he had, I beg of you, put your hand under my thigh; And you shall swear by the Lord, the God of heaven and earth, that you will not take a wife for my son from the daughters of the Canaanites, among whom I have settled,
In whose eyes a vile person is despised, but he who honors those who fear the Lord (who revere and worship Him); who swears to his own hurt and does not change;
I have sworn by Myself, the word is gone out of My mouth in righteousness and shall not return, that unto Me every knee shall bow, every tongue shall swear [allegiance].