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 byothers, 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
Hisnul Muslim 17