Shevuos, Chapter 3, Mishnah 10. This mishnah stands as a contrast: it, along with the mishnah that follows it, forms a contrast to the mishnah at the beginning of the next chapter, which deals with the oath of testimony and the limitations that apply to it. The two mishnayos before us describe how those very limitations do not apply at all to an oath of expression or to a false oath.
"Shevuas Bituy":
The mishnah opens with the oath of expression - an oath that a person articulates with his mouth: "I will do such and such" or "I will not do such and such," "I did such and such" or "I did not do such and such."
The scope of the oath's application:
"Noheges ba'anashim uvanashim" - the oath applies whether the one taking it is a man or a woman.
"Bircho'kim uvikrovim" - whether the oath is made with regard to someone who is not a relative or with regard to someone who is a relative. For example, a person who swears that he will give something to so and so - it makes no difference whether that person is his relative or not, unlike the oath of testimony, as we will see further on.
"Bikesheirim uvipesulim" - whether the person is fit to testify or is disqualified from testifying, this is not relevant to this oath.
"Bifnei beis din veshelo bifnei beis din" - one can take the oath either in the presence of a court or not in its presence.
"Mipi atzmo" - the oath is based on something the person says himself, and he himself must utter the declaration with his mouth. Alternatively, if others administer the oath to him and say to him, "Do you swear to this?" and he answers "Amen" - this is considered as though it came from his own mouth, as if the oath had been said by him.
The liability for transgressing:
"Vechayav al zedonah makos" - one who violates an oath of expression intentionally receives lashes.
"Ve'al shigegasah korban oleh veyored" - one who violates it inadvertently, without intending to, brings an oleh veyored offering: an offering whose type is determined according to the financial situation of the one bringing it.
In summary: in this mishnah we learned the broad scope of the oath of expression - for men and for women, for those unrelated and for relatives, for those fit to testify and those disqualified, in the presence of a court and not in its presence, and from one's own mouth or by answering amen; and also the liability that accompanies it: lashes for an intentional violation and an oleh veyored offering for an inadvertent one.
In the next mishnah, and at the beginning of the next chapter, we will examine the oath of testimony and the limitations that apply to it, from which the comparison to our mishnah becomes clear.