Sayyiduna Khalid bin Walid (may Allah be pleased with him) said to the Messenger of Allah (peace and blessings of Allah be upon him): I am afraid while sleeping. The Messenger of Allah (peace and blessings of Allah be upon him) said: "Recite this «أَعُوذُ بِكَلِمَاتِ اللّٰهِ التَّامَّةِ، مِنْ غَضَبِهِ وَعِقَابِهِ، وَشَرِّ عِبَادِهِ، وَمِنْ هَمَزَاتِ الشَّيَاطِينِ وَأَنْ يَحْضُرُونِ» I seek refuge in the perfect words of Allah from His anger and His punishment, and from the evil of His servants, and from the whisperings of devils, and from their coming near me."