Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
quran:6:163 –

No partner has He. And this I have been commanded, and I am the first ˹among you˺ of the Muslims."  

No associate has He, in these things. And to this, affirmation of the Oneness ˹of God˺, I have been commanded, and I am the first of those who submit’, from among this community.
القرآن:٦:١٦٣ –

لَا شَرِيكَ لَهُ ۖ وَبِذَٰلِكَ أُمِرْتُ وَأَنَا أَوَّلُ الْمُسْلِمِينَ  

{لا شريك له} في ذلك {وبذلك} أي التوحيد {أمرت وأنا أول المسلمين} من هذه الأمة.

See similar narrations below:

Collected by Qurʾān
quran:39:12 –

And I have been commanded to be the first ˹among you˺ of the Muslims."  

and I have been commanded to be the first of those who submit’, from this community.
القرآن:٣٩:١٢ –

وَأُمِرْتُ لِأَنْ أَكُونَ أَوَّلَ الْمُسْلِمِينَ  

{وأمرت لأن} أي بأن {أكون أول المسلمين} من هذه الأمة.