Sirach 23:16-18

Revised Standard Version Catholic Edition

¹⁶ Two sorts of men multiply sins,
    and a third incurs wrath.
The soul heated like a burning fire
    will not be quenched until it is consumed;
a man who commits fornication with his near of kin^[a]
    will never cease until the fire burns him up.
¹⁷ To a fornicator all bread tastes sweet;
    he will never cease until he dies.
¹⁸ A man who breaks his marriage vows
    says to himself, “Who sees me?
Darkness surrounds me, and the walls hide me,
    and no one sees me. Why should I fear?
The Most High will not take notice of my sins.”