Following are a number of back-translations as well as a sample translation for translators of Psalm 99:6:

• Chichewa Contempary Chichewa translation, 2002/2016:
  “Moses and Aaron were some of his priests,
  Samuel was together with them who called on his name;
  they called Jehovah
  and He answered them.” (Source: Mawu a Mulungu mu Chichewa Chalero Back Translation)
• Newari:
  “Moses and Aaron are His priests,
  And Samuel was one who prayed taking His name.
  They made requests to the LORD and He answered them.” (Source: Newari Back Translation)
• Hiligaynon:
  “Moises and Aaron (were) his two priests,
  and Samuel (was) the one who prayed to him.
  They called-(out) for him and he answered them.” (Source: Hiligaynon Back Translation)
• Laarim:
  “Moses and Aaron were his priests,
  Samuel was there among the people who prayed to his names.
  They prayed to the LORD,
  then he answered them.” (Source: Laarim Back Translation)
• Nyakyusa-Ngonde (back-translation into Swahili):
  “Musa na Haruni walikuwa miongoni katika makuhani wake,
  na Samweli alikuwa ni mmoja katika ambao waliabudu kwake.
  Walimwita BWANA, aliwajibu.” (Source: Nyakyusa Back Translation)
• English:
  “Moses and Aaron were two of his priests; Samuel also was someone who prayed to him. Those three cried out to Yahweh to help them, and he answered them.” (Source: Translation for Translators)