بِسْمِ اللهِ ، تَوَكَّلْـتُ عَلى اللهِ وَلا حَوْلَ وَلا قُـوَّةَ إِلاّ بِالله
Bismillāhi, tawakkaltu `alallāhi, wa lā ḥawla wa lā quwwata illā billāh.
In the Name of Allah, I have placed my trust in Allah, there is no might and no power except by Allah.
Abu Dawud 4/325, At-Tirmidhi 5/490. See also Al-Albani, Sahih At-Tirmidhi 3/151
اللّهُـمَّ إِنِّـي أَعـوذُ بِكَ أَنْ أَضِـلَّ أَوْ أُضَـل ، أَوْ أَزِلَّ أَوْ أُزَل ، أَوْ أَظْلِـمَ أَوْ أَُظْلَـم ، أَوْ أَجْهَلَ أَوْ يُـجْهَلَ عَلَـيّ
Allāhumma 'innī 'a`ūdhu bika 'an 'aḍilla, 'aw 'uḍalla, 'aw 'azilla, 'aw 'uzalla, 'aw 'aẓlima, 'aw 'uẓlama, 'aw 'ajhala 'aw yujhala `alayya.
O Allah, I seek refuge in You lest I misguide others , or I am misguided by others , lest I cause others to err or I am caused to err , lest I abuse others or be abused, and lest I behave foolishly or meet with the foolishness of others.
Abu Dawud, Ibn Majah, An-Nasa'i, At-Tirmidhi. See also Al-Albani, Sahih At-Tirmidhi 3/152 and Sahih Ibn Majah 2/336