Surah Al-Baqara, Verse 112:
بَلَىٰ مَنْ أَسْلَمَ وَجْهَهُ لِلَّهِ وَهُوَ مُحْسِنٌ فَلَهُ أَجْرُهُ عِندَ رَبِّهِ وَلَا خَوْفٌ عَلَيْهِمْ وَلَا هُمْ يَحْزَنُونَ
Yes, but whoever submits his face (himself) to Allah (i.e. follows Allah’s Religion of Islamic Monotheism) and he is a Muhsin (good-doer i.e. performs good deeds totally for Allah’s sake only without any show off or to gain praise or fame, etc., and in accordance with the Sunnah of Allah’s Messenger Muhammad Peace be upon him) then his reward is with his Lord (Allah), on such shall be no fear, nor shall they grieve. [See Tafsir Ibn Kathir, Vol. 1, Page 154].