Following are a number of back-translations as well as a sample translation for translators of Zechariah 4:6:

• Kupsabiny: “He (then) said to me, ‘This is a word/message about Zerubbabel. The God of authority is saying to Zerubbabel, ‘You are not able to gain victory by your power or your strength alone, but you do like that in the power of my Spirit.” (Source: Kupsabiny Back Translation)
• Newari: “He said to me, "This is the word of the LORD for Zerubbabel, ‘Not by power, not by might, but by my Spirit,’ says the LORD Almighty.” (Source: Newari Back Translation)
• Hiligaynon: “Then he said to me, ‘Before I answer your (sing.) question, listen-to this message of the LORD Almighty that you (sing.) are-going-to-tell Zerubabel:
  ‘Zerubabel, you (sing.) will-finish building the temple not by the power or by the strength/ability of a person, but by my Spirit.” (Source: Hiligaynon Back Translation)
• English: “Then he said to me, ‘This is the message that Yahweh says that you should give to Zerubbabel the governor of Judah: ‘You will do what I want you to do, but it will not be by your own strength or power. It will be done by the power of my Spirit, says the Commander of the armies of angels.” (Source: Translation for Translators)