203. Allaahumma 'innee 'a'oothu bika 'an 'ushrika bika wa 'anaa 'a'lamu, wa 'astaghfiruka limaa laa 'a'lamu.
O Allah, I seek refuge in You lest I associate anything with You knowingly, and I seek Your forgiveness for what I know not.
Reference: Ahmad 4/403. See also Al-Albani, Sahihul-Jami' As-Saghir 3/233 and Sahihut-Targhib wat- Tarhib 1/19.