28 and the sin they have committed becomes known, they must bring as their offering for the sin they committed a female goat without defect.

Read Leviticus 4:28 Using Other Translations

Or if his sin, which he hath sinned, come to his knowledge: then he shall bring his offering, a kid of the goats, a female without blemish, for his sin which he hath sinned.
or the sin which he has committed is made known to him, he shall bring for his offering a goat, a female without blemish, for his sin which he has committed.
When they become aware of their sin, they must bring as an offering for their sin a female goat with no defects.