Surah Al-Anbiya, ayah 65

21:65

ثُمَّ نُكِسُواْ عَلَىٰ رُءُوسِهِمۡ لَقَدۡ عَلِمۡتَ مَا هَٰٓؤُلَآءِ يَنطِقُونَ ٦٥

Thumma nukisū 'alā ru'ūsihim laqad 'alimta mā hā'ulā'i yantiqūn

Then they reversed themselves,893 [saying], "You have already known that these do not speak!"

Footnotes

893 After first admitting their error, they were seized by pride and obstinacy.