'Lacking' in the Bible

And turn back do the waters from off the earth, going on and returning; and the waters are lacking at the end of a hundred and fifty days.

and the waters have been going and becoming lacking till the tenth month; in the tenth month, on the first of the month, appeared the heads of the mountains.

peradventure there are lacking five of the fifty righteous -- dost Thou destroy for five the whole of the city?' and He saith, 'I destroy it not, if I find there forty and five.'