Numbers 5:7

Verse Numbers 5:7. Shall confess their sin] Without confession or acknowledgment of sin, there was no hope of mercy held out.

He shall recompense] For without restitution, in every possible case, God will not for give the iniquity of a man's sin. How can any person in a case of defraud, with his neighbour's property in his possession, expect to receive mercy from the hand of a just and holy God?

See this subject considered in Clarke's notes on "Genesis 42:38".