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:44:18 –

˹Saying˺, "Render to me the servants of Allah. Indeed, I am to you a trustworthy messenger,"  

˹saying˺, ‘Give over to me, what I summon you to in the way of faith, that is, manifest your faith to me, O, servants of God; indeed I am for you a messenger ˹who is˺ faithful’, in what he has been sent with,
القرآن:٤٤:١٨ –

أَنْ أَدُّوا إِلَيَّ عِبَادَ اللَّهِ ۖ إِنِّي لَكُمْ رَسُولٌ أَمِينٌ  

{أن} أي بأن {أدُّوا إليَّ} ما أدعوكم إليه من الإيمان، أي أظهروا إيمانكم لي يا {عباد الله إني لكم رسول أمين} على ما أُرسلت به.

See similar narrations below:

Collected by Qurʾān
quran:26:107 –

Indeed, I am to you a trustworthy messenger.  

Truly I am a trusted messenger ˹sent˺ to you, to deliver the Message with which I have been sent.
القرآن:٢٦:١٠٧ –

إِنِّي لَكُمْ رَسُولٌ أَمِينٌ  

{إني لكم رسول أمين} على تبليغ ما أرسلت به.