Following are a number of back-translations as well as a sample translation for translators of Amos 1:11:

• Kupsabiny: “God is saying,
  ‘The people of Edom sinned repeatedly.
  I will punish those people for sure,
  because they chased their relatives with swords
  and had no mercy at all for those Israelites.
  They continued to be angry with those people
  and tied the stomach completely (no mercy).” (Source: Kupsabiny Back Translation)
• Newari: “The Lord says,
  ‘The people of Edom have sinned again and again,
  I will surely punish them.
  They chased their brothers, the Israelites,
  with the sword without mercy them at all.
  because of their rage,
  and their fury just got stronger.” (Source: Newari Back Translation)
• Hiligaynon: “This is what- the LORD -says concerning Edom: ‘Because of the continuous sinning of those who-come-from-Edom, I will- surely/severely -punish them. For they chased their blood-relatives who (are the) Israelinhon and killed (them) without mercy. Their anger against the Israelinhon would- not -disappear.” (Source: Hiligaynon Back Translation)
• English: “Yahweh also said this to me:
  ‘I will punish the people of Edom because of the many sins that they have committed;
  I will not change my mind about punishing them,
  because they pursued the people of Israel, who descended from Esau’s brother Jacob, and killed them with swords;
  they did not act mercifully toward them at all.
  They were extremely angry with the people of Israel,
  and they continued to be angry with them.” (Source: Translation for Translators)