Following are a number of back-translations as well as a sample translation for translators of Ezra 6:20:

• Kupsabiny: “The priests and the Levites had all purified/cleansed themselves, so that all were clean. They slaughtered and skinned the young ram/lambs for the Feast of Passover. They ate/celebrated with the other priests and all the people who had returned from slavery.” (Source: Kupsabiny Back Translation)
• Newari: “The priests and Levites, being of one mind, had purified themselves, so they were all clean. So the Levites offered the sacrificial lamb of Passover for all the returned captives, for their brothers the priests and for themselves.” (Source: Newari Back Translation)
• Hiligaynon: “The priests and the Levites made-(themselves)-clean so-that they would-become worthy in their leading the ceremony. Then the Levites slaughtered the offering sheep to celebrate the Feast of the Passing-by of the Angel. They did this for all who had-returned from captivity, for the priests who were their relatives, and for themselves.” (Source: Hiligaynon Back Translation)
• English: “To qualify themselves for offering the sacrifices, the priests and Levites had already purified themselves by performing certain rituals. Then they slaughtered the lambs for the benefit of all the people who had returned from Babylon, for the other priests, and for themselves.” (Source: Translation for Translators)