Numbers 5:7
Ver. 7. Then they shall confess their sin which they have done,.... The form of which confession, according to Fagius, was, O Lord, I am guilty of death, I have deserved to be stoned for this sin, or to be strangled for this trespass, or to be burnt for this crime, &c.
and he shall recompense his trespass with the principal thereof, and add unto it the fifth [part] thereof; paying the whole of whatsoever he had in any manner defrauded his neighbour of, to which he was to add a fifth part of that; that is, as Aben Ezra interprets it, it he confesses of himself, but if there are witnesses of it he must add two fifths, and some say a fifth of a fifth:
and give [it] unto [him] against whom he hath trespassed; as a satisfaction for the injury done him.