اللّهُـمَّ إِنّـي أَعـوذُبِكَ أَنْ أُشْـرِكَ بِكَ وَأَنا أَعْـلَمْ، وَأَسْتَـغْفِرُكَ لِما لا أَعْـلَم

Transliteration:

Allāhumma innī a`ūdhu bika an ushrika bika wa anā a`lam, wa astaghfiruka limā lā a`lam.

Translation:

O Allah, I seek refuge in You lest I associate anything with You knowingly, and I seek Your forgiveness for what I know not.