﴿ وَكَذَّبَ بِهِۦ قَوْمُكَ وَهُوَ ٱلْحَقُّ ۚ قُل لَّسْتُ عَلَيْكُم بِوَكِيلٍۢ ﴾

“and yet, to all this thy peoples have given the lie, although it is the truth. Say [then]: "I am not responsible for your conduct.”

Please check ayah 6:69 for complete tafsir.