In all the examples that Jesus has given, his aim is to make it clear that every oath is related to God, and thus to swear by anything is to invoke God in some way. Even if the Lord is not specifically called as a witness, he still sees and knows all your words. 1 No oath is trivial, such that it can be ignored. 2
34 But I say to you, Do not take an oath at all, either by heaven, for it is the throne of God,