Blessed are you when people insult you, persecute you, and falsely say all kinds of evil against you because of Me. Rejoice and be glad, because great is your reward in heaven; for in the same way they persecuted the prophets before you.
But let your ‘Yes’ be ‘Yes,’ and your ‘No,’ ‘No.’ For whatever is more than these is from the evil one.
Why an oath, if your "I will do it" is not enough? I don´t swear, never did and still here!