اَللّٰهُ أَكْبَرُ، اَللّٰهُ أَعَزُّ مِنْ خَلْقِهِ جَمِيْعاً، اَللّٰهُ أَعَزُّ مِمَّا أَخَافُ وَأَحْذَرُ، أَعُوْذُ بِاللّٰهِ الَّذِيْ لَا إِلٰهَ إِلَّا هُوَ، الْمُمْسِكِ السَّمَوَاتِ السَّبْعِ أَنْ يَقَعْنَ عَلَى الْأَرْضِ إِلَّا بِإِذْنِهِ، مِنْ شَرِّ عَبْدِكَ فُلَانٍ، وَجُنُوْدِهِ وَأَتْبَاعِهِ وَأَشْيَاعِهِ، مِنَ الْجِنِّ وَالْإِنْسِ، اَللّٰهُمَّ كُنْ لِيْ جَارًا مِنْ شَرِّهِمْ، جَلَّ ثَنَاؤُكَ وَعَزَّ جَارُكَ، وَتَبَارَكَ اسْمُكَ، وَلَا إِلٰهَ غَيْرُكَ
Say three times
Allah is the Greatest, Mightier than all His creation. He is Mightier than what I fear and dread. I seek refuge in Allah, Who there is none worthy of worship but Him. He is the One Who holds the seven heavens from falling upon the earth except by His command. (I seek refuge in You Allah) from the evil of Your slave (say the person s name), and his helpers, his followers, and his supporters from among the jinn and mankind. O Allah, be my support against their evil. Glorious are Your praises and mighty is Your patronage. Blessed is Your Name, there is no true Allah but You.
Bukhari, Al Adab Al Mufrad No. 708 . Al-Albani graded it as sahih in Sahih Adab Al Mufrad No. 586