So whoever does righteous deeds while he is a believer - no denial will there be for his effort, and indeed We [i.e., Our angels], of it, are recorders.
(Truly, this, your Ummah is one,) Ibn `Abbas, Mujahid, Sa`id bin Jubayr, Qatadah and `Abdur-Rahman bin Zayd bin Aslam said, "Your religion is one religion." Al-Hasan Al-Basri said: "In this Ayah, Allah explains to them what they should avoid and what they should do." Then He said:
إِنَّ هَـذِهِ أُمَّتُكُمْ أُمَّةً وَاحِدَةً
(Truly, this, your Ummah is one religion,) "Meaning, your path is one path. Certainly this is your Shari`ah (Divine Law) which I have clearly explained you." So Allah says:
وَأَنَاْ رَبُّكُمْ فَاعْبُدُونِ
(and I am your Lord, therefore worship Me.) This is like the Ayah:
So far the Surah deals with the stories of the prophets and several basic as well as minor principles relevant to those stories. The basic beliefs such as Oneness of God, prophethood and the day of Resurrection are common to all prophets and are the foundation of their invitation to the people to follow the True Faith.
Tazkirul Quran
Maulana Wahiduddin KhanOn ayahs 94–96
God has sent all prophets with the same religion, namely, one according to which the one and only God should be one’s God and that He alone should be worshipped. Had people been steadfast in this original religion, all of them would have continued as one Community (ummah). But, people on their own started entering into disputes and thus concocted different versions of the same religion. Individuals exercised their ‘right’ to choose whatever religion best suited their interests. Thus one religion came to be divided into many religions. To God, faith and deeds have importance only when they signify true realization of Him and true obedience to Him. Anything other than these will not be appreciated by God, however much the individuals themselves may attach value to them.
Uthmani text of the Madinah mushaf (King Fahd Complex). Translation: Saheeh International. Tafsir via Quran.com.