For whereas they would not believe any thing by reason of the enchantments; upon the destruction of the firstborn, they acknowledged this people to be the sons of God.
WEB
For while they were disbelieving all things by reason of the enchantments, upon the destruction of the firstborn they confessed the people to be God’s children.
DRC
For whereas they would not believe any thing before by reason of the enchantments, then first upon the destruction of the firstborn, they acknowledged the people to be of God.
LXXE
For whereas they would not believe any thing by reason of the enchantments; upon the destruction of the firstborn, they acknowledged this people to be the sons of God.