﴿ قَالَ ٱلْمَلَأُ ٱلَّذِينَ كَفَرُوا۟ مِن قَوْمِهِۦٓ إِنَّا لَنَرَىٰكَ فِى سَفَاهَةٍۢ وَإِنَّا لَنَظُنُّكَ مِنَ ٱلْكَٰذِبِينَ ﴾

“Said the great ones among his people, who refused to acknowledge the truth: "Verily, we see that thou art weak-minded; and, verily, we think that thou art a liar!"”

Please check ayah 7:69 for complete tafsir.