Sincere submission to Allah (Tawhid)

بَلَىٰ مَنْ أَسْلَمَ وَجْهَهُۥ لِلَّهِ وَهُوَ مُحْسِنٌ فَلَهُۥٓ أَجْرُهُۥ عِندَ رَبِّهِۦ وَلَا خَوْفٌ عَلَيْهِمْ وَلَا هُمْ يَحْزَنُونَ

Yes, [on the contrary], whoever submits his face [i.e., self] in Islām to Allāh while being a doer of good will have his reward with his Lord. And no fear will there be concerning them, nor will they grieve.