Following are a number of back-translations as well as a sample translation for translators of Deuteronomy 3:21:

• Kupsabiny: “Then I said to Joshua,‘You have seen with your own eyes all that the Lord your God has done to these two kings, Sihon and Og. That is how God is going to do to the kings of all the countries that you (plur.) are going to.” (Source: Kupsabiny Back Translation)
• Newari: “At that time I gave Joshua this command, ‘With your own eyes you have seen what the LORD your God did to these two kings. When you go to the west of the river He will also do just like that to all those lands.” (Source: Newari Back Translation)
• Hiligaynon: “‘And at that time, I also told Josue, ‘You (sing.) yourself have-seen all that the LORD your (plur.) God had-done to those two kings. Like that also what the LORD will-do to all the kingdoms which you (plur.) are-going.” (Source: Hiligaynon Back Translation)
• English: “And I told Joshua, ‘You have seen everything that Yahweh our God did to those two kings, Sihon and Og. He will do the same thing to the people who are now in the land that you will be entering.” (Source: Translation for Translators)