“Take a siesta for the Shayaateen do not take a siesta”
(at-Tabaraani in al-Awsat and Abu Na’eem in at-Tibb, al-Albaani declared it hasan in Saheehul Jami’ no. 4307 or Volume 4 Page 174)
Siesta : short afternoon rest (Qaylūlah or Qā’ilah )
Differing from Satan
Satan appears in the form of a sincere advisor and claims that he is giving sincere advice to humans. It is incumbent upon the person to do the opposite of what he orders and to say to him, “If you were to advise anyone, you should advise yourself. You have put yourself in the Hell-fire. And you have earned the wrath of Allah. How can anyone advise another when he does not advise himself?” Al-Haarith ibn Qais said, “If Satan comes to you while you are praying, and says, “You are showing off,” then rebuke him and make it even longer!”” This was his insight, may Allah have mercy on him.
If we are aware that there is some act that is pleasing to Satan or is one of his characteristics, then we must act in a contrary manner. For example, if Satan eats with his left hand, then we must eat with our right hand.
The Prophet (peace be upon him) said, “Each of you should eat with his right drink with his right, take with his right and give with his right for Satan eats with his left, drinks with his left, gives with his left and takes with his left”. Also Satan drinks with us if we drink standing; therefore the Prophet (peace be upon him) taught us that we should drink sitting.
Also the Prophet (peace be upon him) told us that we should take a short nap at midday because Satan does not do so. He said, “Take a short nap because Satan does not take a short nap”
Source : The world of jinn and devils – Umar S.Ashqar