I think you mean "Khanzab". Here is a Hadeeth mentioned in a book on Khushu by Sh Salih al-Munajjid: Abul-As reported that he said: O Messenger of Allah (), Satan interupts me when I pray, and I get confused in my recitation. The Messenger of Allah said: "That is a devil whose name is Khanzab. I f you sense his presence, seek refuge with Allah from him and spit (symbolically, without spittle) towards your left three times. (Abul-As) said: I did that and Allah took him (that devil) away from me" (Muslim, hadith no 2203)