Jesus does not condemn all vow-taking, but he certainly condemns being swept up in the moment and making a foolish vow.

Matthew 5:33-37 Right Response Staff
Jesus does not condemn all vow-taking, but he certainly condemns being swept up in the moment and making a foolish vow.
“We have here an exposition of the seventh commandment, given us by the same hand that made the law, and therefore was fittest to be the interpreter of it… The command is here laid down ‘Thou shalt not commit adultery;’ which includes a prohibition of all other acts of uncleanness, and the desire of them: but the Pharisees, in their …
“It is my firm belief that the number of the saved will be far greater than that of the damned. It is written that in all things Jesus shall have the pre-eminence. And why is this to be left out? Can we think that Satan will have more followers than Jesus? Oh, no! For while it is written that the …
“In the name that should be given to her Son: Thou shalt call his name Jesus, a Saviour. Jesus is the same name with Joshua, the termination only being changed, for the sake of conforming it to the Greek… There were two of that name under the Old Testament, who were both illustrious types of Christ, Joshua who was Israel’s …
Part 2 of a comprehensive biblical teaching on the subject of divorce and remarriage.
Jesus is not merely addressing the need for a superior “positional” righteousness (justification). He is also speaking to the need for a superior “progressive” righteousness (sanctification). In other words, Jesus is not saying, “The Pharisees have a meticulous outward righteousness, but inwardly, their hearts remain corrupted. Therefore, you merely need to receive the superior inward righteousness of Christ by faith.” …