Following are a number of back-translations as well as a sample translation for translators of 2 Chronicles 35:15:

• Kupsabiny: “The singers that hailed from the house of Asaph were where they had been assigned according to the plans of David, Asaph, Heman and Jeduthun, the one who was showing the king the words that God says. The guards at the gates were on guard as it was required. They did not abandon their work because the other Levites had prepared for them the Festival of Passover.” (Source: Kupsabiny Back Translation)
• Newari: “The singers, that is to say the descendants of Asaph, however, took their places according to the rules decided upon by David, Asaph, and Jeduthun the king’s prophet. All the gate guards were standing at their own main gates. They did not need to leave the work of guarding their respective gates because their relatives, the Levites, did their preparations for them.” (Source: Newari Back Translation)
• Hiligaynon: “The musicians who were-descendants of Asaf (were)-there in their assigned-places/post in the temple, according to the rules which David, Asaf, Heman, and Jedutun the prophet of the king had-given. The guards of each gates of the temple did- not -leave their assigned-places/post for their fellow Levites were the-(ones-who) prepared their food.” (Source: Hiligaynon Back Translation)
• English: “The musicians, who were descendants of Asaph, stood in their places, as King David, Asaph, Heman, and Jeduthun the king’s prophet had commanded. The men who guarded the gates of the temple did not need to leave their places, because their fellow descendants of Levi prepared food for them to eat.” (Source: Translation for Translators)