Woe to the Pharisees
They will go far and wide for a convert to be on their side and once they have done that, they make him twice as much as they are - on the path of hell and hell's work...
They are blind guides
They play games of swearing and making oath by the temple vs the gold of the temple, not standing on their word.
Your word should be your word.
In James 4:12
It says don't swear by anything on earth or in heaven. Let your yes be yes and your no be no
In Matthew 5:37
Jesus says let your yes be yes and your no be no, anything more than this is from the evil one.
Jesus wants us to be true to our word and what we say. He wants us to not play games with our promises. It's not a guessing game of what is truth. Speak truth live truth and don't let anything get in there that would sway otherwise - because when we start to live in little lies or not being honorable with our words those choices are not from God - they are from satan, the Father of lies.