Thessalonians is a collection of letters written by Apostle Paul (or Saul when he was a pharisee) to the church of the Thessalonians in God the Father and the Lord Jesus Christ:
1 Thessalonians 2:14-16 (NKJV)
14 For you, brethren, became imitators of the churches of God which are in Judea in Christ Jesus. For you also suffered the same things from your own countrymen, just as they did from the Judeans,
15 who killed both the Lord Jesus and their own prophets, and have persecuted us; and they do not please God and are [d]contrary to all men,
16 forbidding us to speak to the Gentiles that they may be saved, so as always to fill up the measure of their sins; but wrath has come upon them to the uttermost.
[d] Hostile
1 Thessalonians 2:14-16 (NIRV)
14 Brothers and sisters, you became like the members of God’s churches in Judea. They are believers in Christ Jesus, just as you are. Your own people made you suffer. You went through the same things the church members in Judea suffered from the Jews.
15 The Jews who killed the Lord Jesus and the prophets also forced us to leave. They do not please God. They are enemies of everyone.
16 They try to keep us from speaking to the Gentiles. These Jews don’t want the Gentiles to be saved. In this way, these Jews always increase their sins to the limit. God’s anger has come on them at last.
1 Thessalonians 2:14-16 (NRSV)
14 For you, brothers and sisters,[d] became imitators of the churches of God in Christ Jesus that are in Judea, for you suffered the same things from your own compatriots as they did from the Jews,
15 who killed both the Lord Jesus and the prophets,[e] and drove us out; they displease God and oppose everyone
16 by hindering us from speaking to the Gentiles so that they may be saved. Thus they have constantly been filling up the measure of their sins; but God’s wrath has overtaken them at last.[f]
[d] Gk brothers
[e] Other ancient authorities read their own prophets
[f] Or completely or forever