Neder
（重定向自Nedarim）
In Judaism, a neder (נדר, plural nedarim) is a declaration, using the name of God, of the acceptance of a self-made pledge, stating that the pledge must be fulfilled with the same importance as a halakha. The neder may be to fulfill some act in the future (either once or regularly) or to refrain from a particular type of activity of the person's choice. The concept of the neder and the surrounded Jewish law is described at the beginning of the parsha of Matot.