Genesis 8:3

The waters receded steadily from the earth, and after 150 days the waters had gone down.

And the waters returned from off the earth continually: and after the end of the hundred and fifty days the waters were abated.

Note continually: Heb. in going and returning

The waters continually receded from the earth. After the end of one hundred fifty days the waters receded.

and the waters returned from off the earth continually: and after the end of a hundred and fifty days the waters decreased.