Again, you have heard that the ancients were told, ‘YOU SHALL NOT MAKE FALSE VOWS, BUT SHALL FULFILL YOUR VOWS TO THE LORD.’ But I say to you, make no oath at all, either by heaven, for it is the throne of God, or by the earth, for it is the footstool of His feet, or by Jerusalem, for it is THE CITY OF THE GREAT KING. Nor shall you make an oath by your head, for you cannot make one hair white or black. But let your statement be, ‘Yes, yes’ or ‘No, no’; anything beyond these is of evil.
If you always say what you mean, then you don’t need to make vows, because people will know they can trust your word!
Let your “yes” mean “yes” and let your “no” mean “no”. We only create problems for ourselves when we try to deceive one another or tell “white lies” or exaggerate or downplay a serious situation.
If you are always honest and open about your statements and commitments, then you will have a reputation of credibility and people will know that they can take you at face value.
The Lord wants people to have confidence in you, because you represent Him. Is He calling you to speak with integrity in a certain situation in your life right now? Do it. Ask Him for the words and timing, but say what you mean.