Leviticus 5:4-6 ▼

4 Or if a person swears thoughtlessly with his lips to do evil or to do good, in whatever matter a man may speak thoughtlessly with a sworn oath, and it is hidden from him, and then he comes to know it, he will be guilty in one of these.

5 So it shall be, when he becomes guilty in one of these, that he shall confess that in which he has sinned.

6 He shall also bring his guilt offering to Yahweh for his sin which he has committed, a female from the flock, a lamb or a goat, as a sin offering. So the priest shall make atonement on his behalf for his sin.