Dua 109
When you fear of Shirk
اللَّهُمَّ إِنِّي أَعُوذُ بِكَ أَنْ أُشْرِكَ بِكَ وَأَنَا أَعْلَمُ ، وَأَسْتَغْفِرُكَ لِمَا لَا أَعْلَمُ
Allaahumma innee a‛oodhu bika an ushrika bika wa ana a‛lamu, wa astaghfiruka li maa laa a‛lam
“O Allah, I seek refuge with You lest I should commit shirk with You knowingly and I seek Your forgiveness for what I do unknowingly.”
Al-Adab Al-Mufrad 716