Sorry, this is incorrect.
The correct answer is : That you say what you do not do
Ref: Surah As-Saff 61:3
Arabic:
كَبُرَ مَقْتًا عِندَ ٱللَّهِ أَن تَقُولُوا۟ مَا لَا تَفْعَلُونَ ٣
Translation:
How despicable it is in the sight of Allah that you say what you do not do!
Tafseer / Explanation:
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Allah condemns those who say what they do not do, stressing the importance of integrity.
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It is severely disliked by Allah when a person makes claims of righteousness or commitment without acting upon them.
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The verse encourages believers to match their words with sincere actions.
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It warns against hypocrisy, false promises, and empty speech.
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True faith requires honesty, consistency, and fulfilling what one declares, especially in obedience to Allah.