'Unstable' in the Bible

Unstable as water, thou art not abundant; For thou hast gone up thy father's bed; Then thou hast polluted: My couch he went up!

and they give to him seventy silverings out of the house of Baal-Berith, and Abimelech hireth with them men, vain and unstable, and they go after him;

Her prophets unstable -- men of treachery, Her priests have polluted the sanctuary, They have violated the law.