Deuteronomy 13:8
King James Version
“Thou shalt not consent unto him, nor hearken unto him; neither shall thine eye pity him, neither shalt thou spare, neither shalt thou conceal him:”
Context
5And that prophet, or that dreamer of dreams, shall be put to death; because he hath spoken to turn away from the LORD your God, which brought you out of the land of Egypt, and redeemed you out of the house of bondage, to thrust thee out of the way which the LORD thy God commanded thee to walk in. So shalt thou put the evil away from the midst of thee.
6If thy brother, the son of thy mother, or thy son, or thy daughter, or the wife of thy bosom, or thy friend, which as thine own soul, entice thee secretly, saying, Let us go and serve other gods, which thou hast not known, thou, nor thy fathers;
7of the gods of the people which round about you, nigh unto thee, or far off from thee, from the end of the earth even unto the end of the earth;
8Thou shalt not consent unto him, nor hearken unto him; neither shall thine eye pity him, neither shalt thou spare, neither shalt thou conceal him:
9But thou shalt surely kill him; thine hand shall be first upon him to put him to death, and afterwards the hand of all the people.
10And thou shalt stone him with stones, that he die; because he hath sought to thrust thee away from the LORD thy God, which brought thee out of the land of Egypt, from the house of bondage.
11And all Israel shall hear, and fear, and shall do no more any such wickedness as this is among you.