Following are a number of back-translations as well as a sample translation for translators of 1 Chronicles 21:16:

• Kupsabiny: “David saw the angel of God standing between the sky/up and the land/earth below. The angel held a sword and raised it over the city of Jerusalem. Then, David and the elders threw themselves down all wearing sacks which they had put on when they were humbling themselves before God.” (Source: Kupsabiny Back Translation)
• Newari: “When David looked up he saw the angel of the LORD, between heaven and earth, holding his drawn [lit.: naked] sword, ready to destroy Jerusalem. Then David and the elders being clothed in sackcloth lay prostrate on the ground.” (Source: Newari Back Translation)
• Hiligaynon: “David looked-up and he saw the angel of the LORD standing in the air, between heaven and earth holding a sword that pointed to Jerusalem. Then David and the rulers of Israel knelt-down, wearing a sackcloth to show their mourning.” (Source: Hiligaynon Back Translation)
• English: “David looked up and saw the angel whom Yahweh had sent, standing between the sky and the ground. The angel had a sword in his hand that was pointed toward Jerusalem. Then David and the elders of the city, who were wearing clothes made of rough sackcloth, prostrated themselves on the ground.” (Source: Translation for Translators)