Following are a number of back-translations as well as a sample translation for translators of Amos 1:9:

• Kupsabiny: “God has said,
  ‘The people of Tyre have sinned repeatedly.
  I shall punish those people for sure,
  because they brought a whole community to go to Edom to become slaves
  and they did not honor the covenant of friendship that they had made together.” (Source: Kupsabiny Back Translation)
• Newari: “This is what the Lord says,
  ‘The people of Tyre have sinned again and again.
  I will surely punish them.
  They broke their treaty of brotherhood with Israel,
  selling whole communities to Edom.” (Source: Newari Back Translation)
• Hiligaynon: “This is what- the LORD -says concerning Tyre: ‘Because of the continuous sinning of those who-come-from-Tyre, I will- surely/severely -punish them. For all the residents of the towns were-sold as slaves to Edom. And they did- not -obey/follow their agreement with these people as friends.” (Source: Hiligaynon Back Translation)
• English: “Yahweh also said this to me:
  ‘I will punish the people of Tyre city because of the many sins that they have committed;
  I will not change my mind about punishing them,
  because they also captured large groups of our people and took them to Edom,
  disregarding the treaty of friendship that they had made with your rulers.” (Source: Translation for Translators)