Which line helps you predict that the first wish will come true in the monkey's paw?

The line that suggests the first wish will come true in "The Monkey's Paw" is when Mr. White makes his wish for two hundred pounds, and shortly after, they receive news of their son's tragic accident. This connection implies that the paw has the power to grant wishes, but it foreshadows the dark consequences that accompany them. The immediate fulfillment of the wish sets a tone of foreboding, highlighting the theme of unintended outcomes.