I Tessalonicenses 4:6

6 e que, nesta matéria, ninguém ofenda nem defraude a seu irmão; porque o Senhor, contra todas estas coisas, como antes vos avisamos e testificamos claramente, é o vingador,

6 and that in this matter no one should wrong or take advantage of a brother or sister. The Greek word for [brother or sister] ([adelphos]) refers here to a believer, whether man or woman, as part of God's family. The Lord will punish all those who commit such sins, as we told you and warned you before.