Surah An-Nahl · سُوْرَةُ النَّحْلِ · Juz 14
Q 16:125
ٱدْعُ إِلَىٰ سَبِيلِ رَبِّكَ بِٱلْحِكْمَةِ وَٱلْمَوْعِظَةِ ٱلْحَسَنَةِ ۖ وَجَـٰدِلْهُم بِٱلَّتِى هِىَ أَحْسَنُ ۚ إِنَّ رَبَّكَ هُوَ أَعْلَمُ بِمَن ضَلَّ عَن سَبِيلِهِۦ ۖ وَهُوَ أَعْلَمُ بِٱلْمُهْتَدِينَ
Translations
Invite to the way of your Lord with wisdom and good instruction, and argue with them in a way that is best. Indeed, your Lord is most knowing of who has strayed from His way, and He is most knowing of who is [rightly] guided.Par la sagesse et la bonne exhortation appelle (les gens) au sentier de ton Seigneur. Et discute avec eux de la meilleure façon. Car c'est ton Seigneur qui connaît le mieux celui qui s'égare de Son sentier et c'est Lui qui connaît le mieux ceux qui sont bien guidés.Tafsir
Invite - O Messenger - to the religion of Islam, you and the believers who follow you, in a manner that is appropriate for the condition, understanding and mindset of the person who you are inviting and with admonition that contains encouragement and caution. Argue with them in the manner that is best in terms of speech, thought and politeness, for it is not your duty to guide people. You are only required to convey the message to them. Your Lord knows best who has strayed from the religion of Islam and He knows best those who are rightly guided to it, so do not lose yourself in grief over them.
Read Ibn Kathir (Ibn Kathir (abridged, English))
Arabic text: Tanzil (Uthmani). Translations: Sahih International (en), Muhammad Hamidullah (fr). tanzil.net