The Qur’an describes the state of the usurer as the one whom the Devil has exhausted and prostrated by his touch; Allah says: (Those who charge usury are in the same position as those whom the devil hath prostrated by (his) touch. That is because they say: “Trade is like usury” whereas Allah permits trade, and prohibits usury. Thus, whoever heeds this commandment from his Lord, and refrains from usury, he may keep his past earnings, and his case is for Allah (to judge); but whoever returns (to usury) – Such are the rightful owners of the Fire.) (Surat Al Baqarah (The Cow), verse 275)
This state is called in Arabic (Takhabbut) which means, according to Al-Nawawi (may Allah rest his soul), a clumsy movement. When we say (Khabata Al-Jamal), this means that Al-Jamal(the camel) hits the ground by its hooves. Also when a man is acting awkwardly, we say in Arabic that he (Khabata Khabt Ashwaa) i.e. he is acting blindly; as the Arabic word (Ashwaa) means (a poor-sighted female camel.)
The Devil’s touch here means his call for seeking pleasures, satisfying desires, and being occupied by anything but Allah. Thus, whoever follows him, he is then Motakhabbet (disorientated): At times the Devil degraded him to his whims and desires, and at other timesThe King guides him to piety and religion. That is why there is no steady movements or actions, and this is theTakhabbut(disorientation) caused by the Devil.
However, this state from which usurers suffer is not confined to what has been mentioned but it extends to include his mental and psychological state. source: Imanway.com