English Standard Version
But let him ask in faith, with no doubting, for the one who doubts is like a wave of the sea that is driven and tossed by the wind.New International Version
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.Catholic Public Domain Version
But he should ask with faith, doubting nothing. For he who doubts is like a wave on the ocean, which is moved about by the wind and carried away