اللَّهُمَّ إِنِّي أَعُوذُبِكَ أَنْ أُشْرِكَ بِكَ وَأَنَا أَعْلَمُ، وَأَسْتَغْفِرُكَ لِمَا لَا أَعْلَمُ

O Allāh, I take refuge in You lest I should commit shirk with You knowingly and I seek Your forgiveness for what I do unknowingly.

Reference: O Allāh, I take refuge in You lest I should commit shirk with You knowingly and I seek Your forgiveness for what I do unknowingly. Aḥmad (4/403). Also see _Ṣaḥīḥ al-Jāmiʿ_ (#3731, 3/233) and _Ṣaḥīḥ al-Targhīb wa al-Tarhīb_ (#36, 1/122) by al-Albānī.