Surah Al-Isra (17:28)

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

And if you must turn away from them, seeking a mercy from your Lord that you hope for, then say to them a word that is easy [for them to bear].