Supplication to ward off Satan

A: In case it is proven that such money or jewelry are not taken by human beings either amongst the inhabitants of the house or other than them, it is - And Allah knows best - the work of the Satans among Jinn. They do such practices frequently by the permission of Allah (Exalted be He) and there is proof for this from the Qur'an and Sunnah. Allah (Exalted be He) said regarding His Prophet Sulayman (Solomon, peace be upon him), He said: "O chiefs! Which of you can bring me her throne before they come to me surrendering themselves in obedience?" A ‘Ifrît (strong one) from the jinn said: “I will bring it to you before you rise from your place (council). Moreover, it is authentically reported on the authority of Abu Hurayrah (may Allah be pleased with him) who said: Allah's Messenger (peace be upon him) deputed me to keep Zakat-ul-Fitr (obligatory charity paid before the Festival of Breaking the Fast) of Ramadan. A comer came and started taking (stealthily) handfuls of the foodstuff (of Zakat-ul-Fitr). I took hold of him and said, "By Allah, I will take you to Allah's Messenger (peace be upon him)." He said, "Leave me, for I am needy and have many dependents, and I am in great need." I released him, and in the morning Allah's Messenger (peace be upon him) asked me, "O Abu Hurayrah! What did your prisoner do yesterday?" I said, "O Allah's Messenger! The person complained of being needy and of having many dependents, so, I pitied him and let him go." Allah's Messenger (peace be upon him) said, "Indeed, he told you (Part No. 24; Page No. 251) a lie and he will be coming again." I believed that he would show up again as Allah's Messenger (peace be upon him) had told me. So, I waited for him watchfully. When he (showed up and) started stealing handfuls of foodstuff, I caught hold of him again and said, "I will definitely take you to Allah's Messenger (peace be upon him). He said, "Leave me, for I am very needy and have many dependents. I promise I will not come back again." I pitied him and let him go. In the morning Allah's Messenger (peace be upon him) asked me, "O Abu Hurayrah, What did your prisoner do." I replied, "O Allah's Messenger! He complained of his great need and of so many dependents, so I took pity on him and set him free." Allah's Messenger (peace be upon him) said, "Verily, he told you a lie and he will return." I waited for him attentively for the third time, and when he (came and) started stealing handfuls of the foodstuff, I caught hold of him and said, "I will surely take you to Allah's Messenger (peace be upon him) as it is the third time you promise not to return, yet you break your promise and come." He said, "Let me go and I will teach you some words with which Allah will benefit you." I asked, "What are they?" He replied, "Whenever you go to bed, recite Ayat-ul-Kursy (the Qur’anic Verse of Allah’s Chair, Surah Al-Baqarah, 2:255): Allâh! Lâ ilâha illa Huwa (none has the right to be worshipped but He), Al-Hayyul-Qayyum (the Ever Living, the One Who sustains and protects all that exists). (If you do so), Allah will appoint a guard for you who will stay with you and no (Part No. 24; Page No. 252) Satan will come near you until morning." (Abu Hurayrah or another narrator added) that they (the Companions) were very keen to do good deeds... The Prophet (peace be upon him) said, "He really spoke the truth, although he is an absolute liar. Do you know whom you were talking to, these three nights, O Abu Hurayrah?" I said, "No." He said, "It was Satan." (Hadith Mu`allaq (a Hadith missing link in the chain of narration, reported directly from the Prophet) related by Al-Bukhari in a manner hinting to its authenticity).May Allah grant us success. May peace and blessings be upon our Prophet Muhammad, his family, and Companions.