From Bible Matthew 5: 33-37 need explanation and examples?

"Again you heard that it was said to those of ancient times: ‘You must not swear without performing, but you must pay your vows to Jehovah.’ 34 However, I say to you: Do not swear at all, neither by heaven, for it is God’s throne; 35 nor by earth, for it is the footstool of his feet; nor by Jerusalem, for it is the city of the great King. 36 Do not swear by your head, since you cannot turn one hair white or black. 37 Just let your word ‘Yes’ mean yes, your ‘No,’ no, for what goes beyond these is from the wicked one" (Matthew 5:33-37. Bible).

Vows should not be used simply to motivate a person to do or not do something, such as increase one’s time spent in Christian worship or refrain from overeating. Jesus, though, did not object to all oaths, as, for example, when required in a court of law. But he apparently drew the line with regard to indiscriminate oaths.

Oaths by faithful ones of ancient times were often conditional. In solemn prayer they would promise Jehovah, ‘If you help me through this crisis, I will do such-and-such in your behalf.’ But Jesus said: “If you ask the Father for anything he will give it to you in my name.” Far from recommending conditional vows to faithful ones of his time, Jesus assured them: “Until this present time you have not asked a single thing in my name. Ask and you will receive.”—John 16:23, 24.

All scripture was written by superstitious folk and since superstition has no rules, it does not have to conform to fact or evidence of any description..it is invalid..

you don't know what tomorrow will bring so if you don't know tomorrow how can you make an oath for the future