"Then upon Our Messenger is only the clear notification," meaning: it is not his duty to force them to believe.
Interpretation of Surat al-Taghabun from verse 14 to verse 18.
﴿فَإِنَّمَا عَلَى رَسُولِنَا الْبَلاغُ الْمُبِينُ﴾ لَيْسَ عَلَيْهِ أَن يكرههم على الْإِيمَان.
تَفْسِير سُورَة التغابن من الْآيَة ١٤ إِلَى آيَة ١٨.