Dalil
العربية

Quran As-Saf 61:3

كَبُرَ مَقۡتًا عِندَ ٱللَّهِ أَن تَقُولُواْ مَا لَا تَفۡعَلُونَ

Translation

Greatly hateful in the sight of Allāh is that you say what you do not do.