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:38:86 –

Say, ˹O Muhammad˺, "I do not ask you for the Qur'an any payment, and I am not of the pretentious  

Say: ‘I do not ask of you, in return for this, for delivering the Message ˹to you˺, any reward, any fee; nor am I an impostor, so as to make up the Qur’ān myself.
القرآن:٣٨:٨٦ –

قُلْ مَا أَسْأَلُكُمْ عَلَيْهِ مِنْ أَجْرٍ وَمَا أَنَا مِنَ الْمُتَكَلِّفِينَ  

{قل ما أسألكم عليه} على تبليغ الرسالة {من أجر} جُعل {وما أنا من المتكلفين} المتقولين القرآن من تلقاء نفسي.

See similar narrations below:

Collected by Qurʾān
quran:25:57 –

Say, "I do not ask of you for it any payment - only that whoever wills might take to his Lord a way."  

Say: ‘I do not ask of you in return for this, that is, for delivering that ˹Message˺ with which I have been sent, any reward, except that whoever wishes to follow a way to his Lord ˹should do so˺’, by expending his wealth for the sake of ˹attaining˺ God’s pleasure, exalted be He; then ˹whoever wishes to do so˺ I will not prevent him from doing so.
القرآن:٢٥:٥٧ –

قُلْ مَا أَسْأَلُكُمْ عَلَيْهِ مِنْ أَجْرٍ إِلَّا مَنْ شَاءَ أَنْ يَتَّخِذَ إِلَىٰ رَبِّهِ سَبِيلًا  

{قل ما أسألكم عليه} أي على تبليغ ما أرسلت به {من أجر إلا} لكن {من شاء أن يتخذ إلى ربه سبيلا} طريقا بإنفاق ماله في مرضاته تعالى فلا أمنعه من ذلك.