They shall confess their sin — They shall not continue in the denial of the fact, but give glory to God, and take shame to themselves by acknowledging it. The principal — That is, the thing he took away, or what is equivalent to it. And add — Both as a compensation to the injured person for the want of his goods so long, and as a penalty upon the injurious dealer, to discourage others from such attempts.
Related Commentaries of Numbers 5:7
Numbers 5:7
7 Then they shall confess their sin which they have done: and he shall recompense his trespass with the principal thereof, and add unto it the fifth part thereof, and give it unto him against whom he hath trespassed.