Habakkuk says that even if the fig tree does not bud and the fields fail, he will do what?

Answer: Rejoice in the LORD

Though the crops and flocks fail, "yet I will exult in the LORD; I will rejoice in the God of my salvation!"

“Though the fig tree does not bud and no fruit is on the vines, though the olive crop fails and the fields produce no food, though the sheep are cut off from the fold and no cattle are in the stalls, yet I will exult in the LORD; I will rejoice in the God of my salvation!”— Habakkuk 3:17-18 (BSB)