"Nothing is said to you except what was said to the messengers before you." This means: what their people said to them of harm; they used to say to the Messenger: "You are a madman," "You are a sorcerer," and "You are a liar." "Indeed, your Lord is full of forgiveness" for those who believe, "and is full of retribution" for those who do not believe.
﴿مَا يُقَالُ لَكَ إِلا مَا قَدْ قِيلَ لِلرُّسُلِ مِنْ قَبْلِكَ﴾ يَعْنِي: مَا قَالَ لَهُم قَومهمْ من الْأَذَى , كَانُوا يَقُولُونَ للرسول: إِنَّكَ مَجْنُونٌ , وَإِنَّكَ سَاحِرٌ , وَإِنَّكَ كَاذِب ﴿إِن رَبك لذُو مغْفرَة﴾ لمن آمن ﴿وَذُو عِقَاب﴾ لمن لم يُؤمن.