Ibrahim 14:9

Have there not come to you the stories of those who came before you – the people of Noah, ‘Ād and Thamūd, and those who came after them? No one knows them except Allah. Their messengers came to them with clear proofs, but they shoved their hands into their mouths[5] and said, “We disbelieve in what you are sent with, and we surely doubt what you are calling us to.”

[5] as a gesture of denial and rejection.

Has there not reached you the news of those before you - the people of Noah and ʿAad and Thamūd and those after them? No one knows them [i.e., their number] but Allāh. Their messengers brought them clear proofs, but they returned their hands to their mouths[651] and said, "Indeed, we disbelieve in that with which you have been sent, and indeed we are, about that to which you invite us, in disquieting doubt."

[651] Several explanations have been given as to the meaning. Based upon the conclusion of the verse, Ibn Katheer preferred that this was a gesture of denial and rejection.

9. Has not the news reached you, of those before you, the people of Nûh (Noah), and ‘Âd, and Thamûd? And those after them? None knows them but Allâh. To them came their Messengers with clear proofs, but they put their hands in their mouths (biting them from anger) and said: "Verily, we disbelieve in that with which you have been sent, and we are really in grave doubt as to that to which you invite us (i.e. Islâmic Monotheism)."

Hath not the history of those before you reached you: the folk of Noah, and (the tribes of) A'ad and Thamud, and those after them? None save Allah knoweth them. Their messengers came unto them with clear proofs, but they thrust their hands into their mouths, and said: Lo! we disbelieve in that wherewith ye have been sent, and lo! we are in grave doubt concerning that to which ye call us.