To protect from Shirk, Prophet (ﷺ) said:

اَللَّهُمَّ إِنَّا نَعُوذُ بِكَ مِنْ أَنْ نُشْرِكَ بِكَ شَيْئًا نَعْلَمُهُ وَنَسْتَغْفِرُكَ لِمَا لَا نَعْلَمُهُ

Allaahumma inna nau'dhu bika min an nushrika bika shay'an na'lamuhu wa nastaghfiruka lima laa na'lamuh

O Allah, We seek refuge in You from ascribing any partner to you knowingly. We also seek your forgiveness from unknowingly [ascribing partners to you].

Reference: Hasan Ligairihi (Albani). Sahih at-Targib: 36