Following are a number of back-translations as well as a sample translation for translators of Proverbs 25:21:

• Kupsabiny: “When/if a person who hates you is hungry, feed (him), or when/if he is thirsty, draw water for (him).” (Source: Kupsabiny Back Translation)
• Newari: “If your enemy is hungry, give him something to eat,
  and if he is thirsty, give him something to drink.” (Source: Newari Back Translation)
• Hiligaynon: “If your (sing.) enemy is hungry, have-(him)-eat; if thirsty, have-(him)-drink.” (Source: Hiligaynon Back Translation)
• Kankanaey: “If/When your (sing.) enemy is-hungry, feed-(him); if he-is-thirsty, cause-(him)-to-drink.” (Source: Kankanaey Back Translation)
• English: “If your enemies are hungry, give them something to eat;
  if they are thirsty, give them something to drink;” (Source: Translation for Translators)