Qur'an 10:53

۞ وَيَسْتَنۢبِـُٔونَكَ أَحَقٌّ هُوَ ۖ قُلْ إِى وَرَبِّىٓ إِنَّهُۥ لَحَقٌّ ۖ وَمَآ أَنتُم بِمُعْجِزِينَ

“And they ask information of you, [O Muḥammad], "Is it true?" Say, "Yes, by my Lord. Indeed, it is truth; and you will not cause failure [to Allāh]."”

Yunus 10:53 · Saheeh International