Dua For Protection From Shirk
اللّهُـمَّ إِنّـي أَعـوذُبِكَ أَنْ أُشْـرِكَ بِكَ وَأَنا أَعْـلَمْ، وَأَسْتَـغْفِرُكَ لِما لا أَعْـلَم
Allāhumma innī a`ūdhu bika an ushrika bika wa anā a`lam, wa astaghfiruka limā lā a`lam.
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 : Hisn al-Muslim 203
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