1 Thessalonians 4:3-8

For this is the ratzon HASHEM (the will of G-d), your kedushah (holiness), your consecration, that you abstain from zenut (fornication), That each one of you have da'as of how to control your own k'li (vessel) in kedushah and kavod, Not in the passion of ta'avah (evil desire, lust) like Goyim who do not have da'as of HASHEM; That no man commit peysha and take advantage of one of his Achim b'Moshiach in this [sexual] matter, because HASHEM is the Nokem (Avenger) concerning all these things, just as also we told you before and warned you. For [as far as our bechirah (election) is concerned], HASHEM did not summon us for tu'ma (uncleanness) but in kedushah (holiness). Therefore, the one rejecting this mitzvah (commandment) does not reject Bnei Adam but HASHEM who gives to you His Ruach Hakodesh.