27 'If anyone of the common people sins unintentionally by doing something against any of the commandments of the Lord in anything which ought not to be done, and is guilty, 28 or if his sin which he has committed comes to his knowledge, then he shall bring as his offering a kid of the goats, a female without blemish, for his sin which he has committed. 29 And he shall lay his hand on the head of the sin offering, and kill the sin offering at the place of the burnt offering. 30 Then the priest shall take some of its blood with his finger, put it on the horns of the altar of burnt offering, and pour all the remaining blood at the base of the altar. 31 He shall remove all its fat, as fat is removed from the sacrifice of the peace offering; and the priest shall burn it on the altar for a sweet aroma to the Lord. So the priest shall make atonement for him, and it shall be forgiven him. 32 'If he brings a lamb as his sin offering, he shall bring a female without blemish. 33 Then he shall lay his hand on the head of the sin offering, and kill it as a sin offering at the place where they kill the burnt offering. 34 The priest shall take some of the blood of the sin offering with his finger, put it on the horns of the altar of burnt offering, and pour all the remaining blood at the base of the altar. 35 He shall remove all its fat, as the fat of the lamb is removed from the sacrifice of the peace offering. Then the priest shall burn it on the altar, according to the offerings made by fire to the Lord. So the priest shall make atonement for his sin that he has committed, and it shall be forgiven him.

Matthew Henry's Commentary on Leviticus 4:27-35

Commentary on Leviticus 4:27-35

(Read Leviticus 4:27-35)

Here is the law of the sin-offering for a common person. To be able to plead, when charged with sin, that we did it ignorantly, and through the surprise of temptation, will not bring us off, if we have no interest in that great plea, Christ hath died. The sins of ignorance committed by a common person, needed a sacrifice; the greatest are not above, the meanest are not below Divine justice. None, if offenders, were overlooked. Here rich and poor meet together; they are alike sinners, and welcome to Christ. From all these laws concerning the sin-offerings, we may learn to hate sin, and to watch against it; and to value Christ, the great and true Sin-offering, whose blood cleanses from all sin, which it was not possible that the blood of bulls and of goats should take away. For us to err, with the Bible in our hands, is the effect of pride, sloth, and carelessness. We need to use frequent self-examination, with serious study of the Scriptures, and earnest prayer for the convincing influences of God the Holy Spirit; that we may detect our sins of ignorance, repent, and obtain forgiveness through the blood of Christ.