"Above all things, my brothers, do not use oaths, whether 'by heaven' or 'by earth' or by anything else. When you say yes or no, let it be plain 'Yes' or 'No', for fear that you expose yourselves to Judgement."  (James 5:12 NEB).

"Again, you have learned that our forefathers were told, "Do not break your oath", and, "Oaths sworn to the Lord must be kept." But what I tell you is this: You are not to swear at all     not by heaven, for it is God's throne, nor by earth, for it is His footstool, nor by Jerusalem, for it is the city of the great King, nor by your own head, because you cannot turn one hair of it white or black. Plain "Yes" or "No" is all you need to say; anything beyond that comes from the devil."  (Matt 5:33  37 NEB).

"Do not become a witness against your fellow man without grounds. Then you would have to be foolish with your lips (1) Do not say: "Just as he did to me, so I am going to do to him.  I shall repay to each one according to his acting."  (Prov 24:28,29).

"Do not inure your mouth to oaths or make a habit of naming the Holy One. As a slave constantly under the lash is never free from weals, so the man who has oaths and the Sacred Name for ever on his lips will never be clear of guilt. A man given to swearing is lawless to the core;  the scourge will never be far from his house. If he goes back on his word, he must bear the blame;  if he wilfully neglects it, he sins twice over; if his oath itself was  insincere, he cannot be acquitted; his house will be filled with trouble."  (Eccus 23:9  11 NEB).

(1)  Misrepresent him in your evidence. (NEB).