Kommentar zu Tehillim 109:11

May a creditor search out all he has Heb. ינקש. A person who toils and searches, and longs passionately to do something is described by the expression מִתְנַקֵשׁ, i.e., shaken and going from place to place, like (Dan. 5:6): “and his knees knocked (נקשן) against each other.”