(Asshuara’) 26 : 136
قَالُوا سَوَاءٌ عَلَيْنَا أَوَعَظْتَ أَمْ لَمْ تَكُنْ مِنَ الْوَاعِظِينَ
They said: "It is the same to us whether you advise or are not of the advisors”.
See expalantion 15: 90-91; 21: 24 and 25: 29-30.