'Unstedfast' in the Bible

And Jesus answering said, 'O generation, unstedfast and perverse, till when shall I be with you? till when shall I bear you? bring him to me hither;'

And Jesus answering said, 'O generation, unstedfast and perverse, till when shall I be with you, and suffer you? bring near hither thy son;'

all things, indeed, are pure to the pure, and to the defiled and unstedfast is nothing pure, but of them defiled are even the mind and the conscience;

and to fearful, and unstedfast, and abominable, and murderers, and whoremongers, and sorcerers, and idolaters, and all the liars, their part is in the lake that is burning with fire and brimstone, which is a second death.'