Roman Catechism 19.172

Chapter 19 — Part II: The Sacraments — Penance

Section 172. But as there are many who readily promise to comply with their duty in this respect, yet are deliberately determined never to fulfil their promises, these persons should be obliged to make restitution, and the words of the Apostle are to be frequently pressed upon their minds: He that stole, let him now steal no more; but rather let him labour, working with his hands the thing which is good, that he may have something to give to him that suffereth need.