'Like a Wave' in the Bible

"After this, the Levites will go in to do the work of the tent of meeting. So you must cleanse them and offer them like a wave offering.

The Levites purified themselves and washed their clothing; then Aaron presented them like a wave offering before the Lord, and Aaron made atonement for them to purify them.

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.