Sura al-Aʿrāf 7:93

فَتَوَلَّىٰ عَنْهُمْ وَقَالَ يَٰقَوْمِ لَقَدْ أَبْلَغْتُكُمْ رِسَٰلَٰتِ رَبِّى وَنَصَحْتُ لَكُمْ فَكَيْفَ ءَاسَىٰ عَلَىٰ قَوْمٍ كَٰفِرِينَ

fa-tawallā ʿanhum wa-qāla yā-qawmi la-qad ablaghtukum risālāti rabbī wa-naṣaḥtu la-kum fa-kayfa āsa ʿalā qawmin kāfirīna

So Shu'aib left them, saying: "O my people! I did indeed convey to you the messages for which I was sent by my Lord: I gave you good counsel, but how shall I lament over a people who refuse to believe!"