Qur'an 17:28

وَإِمَّا تُعْرِضَنَّ عَنْهُمُ ٱبْتِغَآءَ رَحْمَةٍ مِّن رَّبِّكَ تَرْجُوهَا فَقُل لَّهُمْ قَوْلًا مَّيْسُورًا

But if thou turn away from them, seeking mercy from thy Lord, for which thou hopest, then speak unto them a reasonable word.