James 1:6

But when he asks, he must believe and not doubt, because he who doubts is like a wave of the sea, blown and tossed by the wind.

(New International Version)

But he must ask in faith without any doubting, for the one who doubts is like the surf of the sea, driven and tossed by the wind.

(New American Standard Bible)

But let him ask in faith, nothing wavering. For he that wavereth is like a wave of the sea driven with the wind and tossed.

(King James Version)