I. The offences here supposed are, 1. A man's concealing the truth when he was sworn as a witness to speak the truth, the whole truth, and nothing but the truth. Judges among the Jews had power to adjure not only the witnesses, as with us, but the person suspected (contrary to a rule of our law, that no man is bound to accuse himself), as appears by the high priest adjuring our Saviour, who thereupon answered, though before he stood silent, Mat 26:63, Mat 26:64. Now (Lev 5:1), If a soul sin (that is, a person, for the soul is the man), if he hear the voice of swearing (that is, if he be adjured to testify what he knows, by an oath of the Lord upon him, Kg1 8:31), if in such a case, for fear of offending one that either has been his friend or may be his enemy, he refuses to give evidence, or gives it but in part, he shall bear his iniquity. And that is a heavy burden, which, if some course be not taken to get it removed, will sink a man to the lowest hell. He that heareth cursing (that is, that is thus adjured) and betrayeth it not (that is, stifles his evidence, and does not utter it), he is a partner with the sinner, and hateth his own soul; see Pro 29:24. Let all that are called out at any time to bear testimony think of this law, and be free and open in their evidence, and take heed of prevaricating. An oath of the Lord is a sacred thing, and not to be dallied with. 2. A man's touching any thing that was ceremonially unclean, Lev 5:2, Lev 5:3. If a man, polluted by such touch, came into the sanctuary inconsiderately, or if he neglected to wash himself according to the law, then he was to look upon himself as under guilt, and must bring his offering. Though his touching the unclean thing contracted only a ceremonial defilement, yet his neglect to wash himself according to the law was such an instance either of carelessness or contempt as contracted a moral guilt. If at first it be hidden from him, yet when he knows it he shall be guilty. Note, As soon as ever God by his Spirit convinces our consciences of any sin or duty we must immediately set in with the conviction, and prosecute it, as those that are not ashamed to own our former mistake. 3. Rash swearing. If a man binds himself by an oath that he will do or not do such a thing, and the performance of his oath afterwards proves either unlawful or impracticable, by which he is discharged from the obligation, yet he must bring an offering to atone for his fully in swearing so rashly, as David that he would kill Nabal. And then it was that he must say before the angel that it was an error, Ecc 5:6. He shall be guilty in one of these (Lev 5:4), guilty if he do not perform his oath, and yet, if the matter of it were evil, guilty if he do. Such wretched dilemmas as these do some men bring themselves into by their own rashness and folly; go which way they will their consciences are wounded, sin stares them in the face, so sadly are they snared in the words of their mouth. A more sad dilemma this is than that of the lepers, "If we sit still, we die; if we stir, we die." Wisdom and watchfulness beforehand would prevent these straits.
II. Now in these cases, 1. The offender must confess his sin and bring his offering (Lev 5:5, Lev 5:6); and the offering was not accepted unless it was accompanied with a penitential confession and a humble prayer for pardon. Observe, The confession must be particular, that he hath sinned in that thing; such was David's confession (Psa 51:4), I have done this evil; and Achan's (Jos 7:20), Thus and thus have I done. Deceit lies in generals; many will own in general they have sinned, for that all must own, so that it is not any particular reproach to them; but that they have sinned in this thing they stand too much upon their honour to acknowledge: but the way to be well assured of pardon, and to be well armed against sin for the future, is to be particular in our penitent confessions. 2. The priest must make atonement for him. As the atonement was not accepted without his repentance, so his repentance would not justify him without the atonement. Thus, in our reconciliation to God, Christ's part and ours are both needful.

To do evil, or to do good - It is very likely that rash promises are here intended; for if a man vow to do an act that is evil, though it would be criminal to keep such an oath or vow, yet he is guilty because he made it, and therefore must offer the trespass-offering. If he neglect to do the good he has vowed, he is guilty, and must in both cases confess his iniquity, and bring his trespass-offering.

Or if a soul swear,.... A rash or vain oath:

pronouncing with his lips; not in his heart, as Jarchi notes; not saying within himself that he would do this, or that, or the other thing, but expressing his oath plainly and distinctly, with an audible voice:

to do good, or to do evil; which was either impossible or unlawful for him to do; whether the good or evil he swears to do is to himself or to another; whether he swears to do good to himself, and evil to another, or, good to another, and evil to himself, see Psa 15:4. The Targum of Jonathan paraphrases it,"whatsoever a man expresses, whether of anything present or future;''as if he swears he has done such and such a thing, whether good or evil; or that he will do it, be it what it will, and it is not in the power of his hands to do it, or, if he did it, it would be doing a wrong thing:

whatsoever it be that a man shall pronounce with an oath, and it be hid from him; he has forgot that he ever swore such an oath:

and when he knoweth of it, then he shall be guilty in one of these; when he is told of it, and it is made clearly to appear to him, that he did at such a time, and in such a place, deliver out a rash oath concerning this, or the other thing, then he shall be chargeable with guilt in one of these; either in rashly swearing to do good when it was not in his power, or to do evil, which would have been unlawful. The Targum of Jonathan is,"if he knows that he has falsified, and repents not, he is guilty.''

FOR SWEARING. (Lev 5:4-19)

if a soul swear--a rash oath, without duly considering the nature and consequences of the oath, perhaps inconsiderately binding himself to do anything wrong, or neglecting to perform a vow to do something good. In all such cases a person might have transgressed one of the divine commandments unwittingly, and have been afterwards brought to a sense of his delinquency.