Al An'am, 108 Ayah
6:108
وَلَا تَسُبُّواْ ٱلَّذِينَ يَدۡعُونَ مِن دُونِ ٱللَّهِ فَيَسُبُّواْ ٱللَّهَ عَدۡوَۢا بِغَيۡرِ عِلۡمٖۗ كَذَٰلِكَ زَيَّنَّا لِكُلِّ أُمَّةٍ عَمَلَهُمۡ ثُمَّ إِلَىٰ رَبِّهِم مَّرۡجِعُهُمۡ فَيُنَبِّئُهُم بِمَا كَانُواْ يَعۡمَلُونَ ١٠٨
Wa Lā Tasubbū Al-Ladhīna Yad`ūna Min Dūni Al-Lahi Fayasubbū Al-Laha `Adwan Bighayri `Ilmin ۗ Kadhālika Zayyannā Likulli 'Ummatin `Amalahum Thumma 'Ilá Rabbihim Marji`uhum Fayunabbi'uhum Bimā Kānū Ya`malūna
And do not insult those they invoke other than Allah, lest they insult Allah in enmity without knowledge. Thus We have made pleasing to every community their deeds. Then to their Lord is their return, and He will inform them about what they used to do.