'Billowing' in the Bible

And they came [and] woke him up, saying, "Master, master! We are perishing!" So he got up [and] rebuked the wind and the billowing waves of water and they ceased, and it became calm.

But he must ask [for wisdom] in faith, without doubting [God’s willingness to help], for the one who doubts is like a billowing surge of the sea that is blown about and tossed by the wind.