Genesis 18:14
Is any thing too hard for the LORD? At the time appointed I will return unto thee, according to the time of life, and Sarah shall have a son.
Is anything too hard for the Lord?.... Whose power is infinite; or "too wonderful" {x}, so wonderful and beyond all belief, that it can never be thought it will be done by him; and why then should it be thought incredible or impossible that Sarah should have a child, though she is old? Or, is "anything hidden from the Lord" {y}? Nothing can be, not Sarah's laughter.
At the time appointed will I return to thee, according to the time of life, and Sarah shall have a son; which words are repeated not merely for the confirmation of Abraham's faith, which staggered not, but to remove Sarah's unbelief, and to encourage her faith in the divine promise.
{x} alpyh "nunquid mirabile vel mirificabitur", Munster, Piscator, Schmidt.
{y} "Nunquid abscondetur", Pagninus, Cartwright; "an potest occultari", Junius & Tremellius, Fagius; so the Targum of Jonathan and Aben Ezra.