Following are a number of back-translations as well as a sample translation for translators of Genesis 17:21:

• Kankanaey: “But the fulfillment (lit. extension) however of what I promised you (sing.) is Isaac to whom your (sing.) spouse will-give-birth at this time in the coming year.'” (Source: Kankanaey Back Translation)
• Newari: “My covenant, however, will be with Isaac. Sarah will give birth to him next year at this time.'” (Source: Newari Back Translation)
• Hiligaynon: “However, for/(through) Isaac and to his descendants I will- only -fulfill my agreement with you. Sara will-give-birth to Isaac at this time next year.'” (Source: Hiligaynon Back Translation)
• English: “But Isaac, the son whom Sarah will give birth to at this time next year, is the one with whom I will establish my agreement.'” (Source: Translation for Translators)